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How to Enable and Rebill LC Email Verification

Email Validation is a process that checks if an email address is deliverable. In other words, this tool determines if it’s possible to deliver mail to that email address before you send an email.

8 min read1,842 words21 explained imagesUpdated Thu, 4 Jun at 9:31 PM
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On this page
  1. What is Email Verification
  2. How to Enable Email Verification (Agency Level)
  3. How to Enable Email Verification (Subaccount Level)
  4. Enable Email Re-verification Every 90 Days
  5. Email Verification Pricing and Rebilling
  6. How Email Verification Works
  7. What Email Verification Actually Checks
  8. What Email Verification Does NOT Guarantee
  9. Common Reasons a Verified Email Still Bounces
  10. Frequently Asked Questions
Email Deliverability
Email Verification
Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun.
What You'll Learn

Email Verification is a bulk tool that checks whether an email address is legitimate and active before any email is sent. When enabled, it runs automatically in the background — no manual action required.

This article covers how to enable verification at the agency and subaccount levels, how to set up 90-day re-verification, pricing and rebilling, and how to check verification status on individual contacts.

1What is Email Verification

Email Verification is a background process that checks whether an email address has the qualities of a legitimate, active account. It runs automatically when enabled — you don't need to trigger it manually.

By filtering out fake or inactive addresses before sending, Email Verification keeps your sending score high and significantly improves email delivery rates. It can also be configured to re-verify addresses every 90 days, since email quality can change over time.

Note

Email Verification is a paid service. It is available exclusively for LC Email and Mailgun email providers.

2How to Enable Email Verification (Agency Level)

Agency admins can enable or disable Email Verification for individual subaccounts — or all subaccounts at once — from the Agency Settings panel.

Step 1
Navigate to Agency → Settings

Open your Agency dashboard and go to Settings.

How to Enable Email Verification (Agency Level) (image 1 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "How to Enable Email Verification (Agency Level)" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "How to Enable Email Verification (Agency Level)" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 1 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues
Step 2
Navigate to Email Services → Location Settings → Email Verification

Within Settings, go to Email Services → Location Settings and locate the Email Verification column.

How to Enable Email Verification (Agency Level) (image 2 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "How to Enable Email Verification (Agency Level)" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "How to Enable Email Verification (Agency Level)" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 2 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues
Step 3
Enable or disable Email Verification per subaccount

Toggle Email Verification on or off for each individual subaccount, or use the bulk toggle to apply the setting across all subaccounts at once.

How to Enable Email Verification (Agency Level) (image 3 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "How to Enable Email Verification (Agency Level)" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "How to Enable Email Verification (Agency Level)" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 3 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues
Step 4 — Optional
Configure automatic verification for new subaccounts

Navigate to Advanced Settings and check or uncheck "Automatically enable email verification for new Subaccounts" to control default behavior for newly created subaccounts.

How to Enable Email Verification (Agency Level) (image 4 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "How to Enable Email Verification (Agency Level)" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "How to Enable Email Verification (Agency Level)" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 4 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues

3How to Enable Email Verification (Subaccount Level)

Subaccount users can also enable Email Verification directly from their own account settings.

Step 1
Navigate to Subaccount → Settings

Open the subaccount and go to Settings.

How to Enable Email Verification (Subaccount Level) (image 5 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "How to Enable Email Verification (Subaccount Level)" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "How to Enable Email Verification (Subaccount Level)" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 5 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues
Step 2
Navigate to Business Profile → General

Go to Business Profile → General within Settings.

How to Enable Email Verification (Subaccount Level) (image 6 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "How to Enable Email Verification (Subaccount Level)" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "How to Enable Email Verification (Subaccount Level)" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 6 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues
Step 3
Check or uncheck the Verify Email setting

Toggle the Verify Email checkbox to enable or disable email verification for this subaccount.

How to Enable Email Verification (Subaccount Level) (image 7 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "How to Enable Email Verification (Subaccount Level)" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "How to Enable Email Verification (Subaccount Level)" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 7 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues
Heads Up

When a subaccount user enables Email Verification, a notification is automatically sent to all active agency admins and the company's registered email address (LC Email only). Subject line: ATTN: Email Verification Enabled in Sub-Account.

How to Enable Email Verification (Subaccount Level) (image 8 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "How to Enable Email Verification (Subaccount Level)" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "How to Enable Email Verification (Subaccount Level)" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 8 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues

4Enable Email Re-verification Every 90 Days

Email address quality can change over time — an address that was valid six months ago may now be inactive or abandoned. Enabling 90-day re-verification ensures you catch these changes before they hurt your sender score, rather than after.

Step 1
Navigate to Agency → Subaccounts → Manage Client

Go to Agency → Subaccounts, click the three-dot menu in the lower right corner of the subaccount card, and select Manage Client.

Enable Email Re-verification Every 90 Days (image 9 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "Enable Email Re-verification Every 90 Days" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "Enable Email Re-verification Every 90 Days" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 9 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues
Step 2
Enable Re-verification in Advanced Email Settings

Navigate to Advanced Settings → Advanced Email Settings and check or uncheck "Enable Re-verification for 90 days".

Enable Email Re-verification Every 90 Days (image 10 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "Enable Email Re-verification Every 90 Days" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "Enable Email Re-verification Every 90 Days" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 10 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues

5Email Verification Pricing and Rebilling

Pricing

$2.50 per 1,000 Email Verifications — available on all plans. This is significantly lower than most providers (e.g., Mailgun charges $12/1,000).

Rebilling settings for LC Email Verification are found in SaaS Configurator → Plan Details → Rebilling. Rebilling capabilities vary by plan:

PlanRebilling Capability
StarterNo rebilling
UnlimitedFixed markup only (1.05x)
ProVariable markup (1.05x – 10x)
Email Verification Pricing and Rebilling (image 11 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "Email Verification Pricing and Rebilling" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "Email Verification Pricing and Rebilling" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 11 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues

To review individual Email Verification charges, navigate to the Agency Billing Wallet. Every execution is itemized so you can audit usage with full transparency.

Step 1
Navigate to Agency → Settings

Open your Agency dashboard and go to Settings.

Email Verification Pricing and Rebilling (image 12 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "Email Verification Pricing and Rebilling" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "Email Verification Pricing and Rebilling" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 12 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues
Step 2
Navigate to Billing → Wallet & Transactions → Detailed Transactions

Go to Billing → Wallet & Transactions and open Detailed Transactions.

Email Verification Pricing and Rebilling (image 13 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "Email Verification Pricing and Rebilling" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "Email Verification Pricing and Rebilling" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 13 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues
Step 3
Filter to Email Verification and review each transaction

Use the filter to show only Email Verification items, then click into individual transactions for a full breakdown.

Email Verification Pricing and Rebilling (image 14 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "Email Verification Pricing and Rebilling" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "Email Verification Pricing and Rebilling" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 14 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues

6How Email Verification Works

When Email Verification is active, all email addresses are verified before the first email is sent — if they haven't been verified already. If 90-day re-verification is also enabled, any verification older than 90 days will expire and the address will be re-checked before the next send.

You can also manually check or trigger verification for any contact from the Contact Details page.

Step 1
Navigate to Subaccount → Contacts

Go to the Contacts section of the subaccount.

How Email Verification Works (image 15 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "How Email Verification Works" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "How Email Verification Works" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 15 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues
Step 2
Click into a contact's details

Select a contact from the list to open their detail view.

How Email Verification Works (image 16 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "How Email Verification Works" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "How Email Verification Works" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 16 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues
Step 3
Expand the Contact section

Click to expand the Contact section within the detail panel.

How Email Verification Works (image 17 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "How Email Verification Works" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "How Email Verification Works" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 17 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues
Step 4
Scroll down to the Email field

The Email field displays the current verification status for this contact's email address.

How Email Verification Works (image 18 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "How Email Verification Works" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "How Email Verification Works" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 18 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues

Verification status meanings:

StatusMeaning
Not VerifiedThe email has not yet been tested by the Email Verification service.
InvalidThe email was tested and failed Email Verification. Emails will not be sent to this address.
VerifiedThe email was tested and passed Email Verification. Safe to send.
How Email Verification Works (image 19 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "How Email Verification Works" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "How Email Verification Works" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 19 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues
Not Verified status
How Email Verification Works (image 20 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "How Email Verification Works" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "How Email Verification Works" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 20 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues
Invalid status
How Email Verification Works (image 21 of 21) What this shows Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and… What this shows Illustrates the "How Email Verification Works" section of "How to Enable and Rebill LC Email Verification". This screenshot appears in the "How Email Verification Works" section of "How to Enable and Rebill LC Email Verification". For context, this section explains: Email Deliverability Email Verification Automatically validate email addresses before sending to protect your sender reputation and improve deliverability. Available for LC Email and Mailgun. What You'll Learn Email Verification is a bulk tool that checks whether an email address is legitimate and…. This part of the guide covers 1 field, listed below. Image 21 of 21
Fields in this part of the guide Your sending domain or IP is not on a blocklist
Buttons and menus referenced LC EmailMailgunSettingsEmail Services → Location SettingsEmail VerificationAdvanced SettingsBusiness Profile → GeneralVerify EmailAgency → Subaccountsthree-dot menuManage Client"Enable Re-verification for 90 days"
All 5 steps in this procedure
  1. The email will not bounce — a "valid" address can still be rejected post-delivery
  2. The email will land in the inbox rather than spam or be silently discarded
  3. The address is still active — mailboxes can be deactivated after verification passes
  4. Your sending domain or IP is not on a blocklist
  5. The recipient's inbox is not full or subject to temporary server issues
Verified status

7What Email Verification Actually Checks

Email verification tools run a series of technical checks to assess whether an address is likely to exist and accept mail. Here is what each check does:

Check 1
Syntax Validation

Confirms the address is properly formatted — e.g., name@domain.com. Catches obvious typos like missing @ symbols or invalid characters.

Check 2
Domain / MX Record Lookup

Verifies that the domain (e.g., gmail.com) has active MX records, meaning the domain is configured to receive email at all.

Check 3
SMTP Ping (Mailbox Existence)

Initiates a connection to the mail server and asks if the specific mailbox exists — without actually sending a message. If the server responds positively, the address is marked "valid."

What This Means

Passing all three checks means the address appears to exist at the time of verification. It does not mean your email will reach the inbox.

8What Email Verification Does NOT Guarantee

Verification is a pre-send check — it cannot control what happens during and after delivery. The following are outside its scope:

  • The email will not bounce — a "valid" address can still be rejected post-delivery
  • The email will land in the inbox rather than spam or be silently discarded
  • The address is still active — mailboxes can be deactivated after verification passes
  • Your sending domain or IP is not on a blocklist
  • The recipient's inbox is not full or subject to temporary server issues
Note

Think of verification like confirming a mailing address exists on a map — it doesn't guarantee the package will be accepted at the door, or that no one moved out since you last checked.

9Common Reasons a Verified Email Still Bounces

Even after passing verification, emails can still fail to deliver. Here are the most common causes and why verification can't catch them:

CauseWhy Verification Misses It
Catch-all domainServer accepts all addresses during SMTP check, then rejects unknown mailboxes after delivery
Mailbox deactivated after verificationAddress was valid at check time; account was deleted or suspended since then
Sender reputation / IP blocklistVerification checks the recipient — not whether your sending domain or IP is trusted
Spam / content filteringRecipient's mail server rejects the message based on content or DMARC/SPF/DKIM failure
Role-based address filteringAddresses like info@, admin@, noreply@ may verify as valid but reject marketing email by policy
Temporary soft bounceServer was down, over quota, or greylisting at delivery time — unrelated to address validity
Important

Catch-all domains are the most common culprit. There is no reliable way for a verification tool to distinguish a real mailbox from a catch-all, because the server intentionally accepts everything during the SMTP handshake.

10Frequently Asked Questions

Q: What does Email Verification check for?
Email Verification checks whether an email address is on a known "bad" list at Mailgun, and additionally verifies that: the syntax is correct; the domain is set up to receive email; the address exists; the address is not high-risk; and the address is not role-based (such as info@domain.com or admin@domain.com).
Q: Why is Email Verification important?
Email Verification boosts your delivery rate by removing invalid addresses, maintains list hygiene, improves marketing metrics like open rate and CTR, and protects your sender reputation — all of which directly impact whether your emails reach inboxes.
Q: How does Email Verification impact my email deliverability?
Bounced emails damage your IP address and domain reputation. When your email service provider can't deliver a message, it signals to email clients that your domain may not be trustworthy — leading to future emails landing in spam or being blocked entirely. Verifying addresses before sending reduces bounce rates and keeps your sender reputation intact.
Q: Why does my subaccount have automatic email verification enabled?
Automatic email verification is enabled for subaccounts created within the last 30 days where the deliverability rate of the imported email list fell below 90%. This safeguard protects your sending reputation while the account's list quality is being established.
Q: When should I verify my email list?
Verify your list if you've purchased a mailing list (which is not recommended), inherited an unfamiliar list, or if your list has grown significantly or hasn't been cleaned in a while. When in doubt, run a health check — catching stale addresses proactively is always better than discovering them through bounces.
Q: Where can I see my client's email verification usage?
Navigate to Agency Settings → Billing → See Details (under Credits) to view per-client usage. For a full itemized breakdown, use the Billing → Wallet & Transactions → Detailed Transactions view and filter by Email Verification.
Q: How can I bill my clients for Email Verification usage?
If you are on the Unlimited or Pro plan, you can enable rebilling through SaaS Configurator → Plan Details → Rebilling. This lets you automatically pass costs on to clients at a markup, saving you from having to invoice them manually.
Q: Does Email Verification affect contacts who have already been sent emails?
No. Verification only runs before the next email send for a given contact. Previously sent emails are not affected. If 90-day re-verification is enabled, a contact's verification status will expire after 90 days and they will be re-checked before any subsequent send.

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