Where Can I Find My Dedicated Domain SMTP Credentials?
Find and create SMTP credentials for your LC Email dedicated domain. See smtp.mailgun.org settings, ports (25, 465, 587, 2525), plus reset and delete steps.
5 min read1,126 words7 explained imagesUpdated Tue, 30 Jun at 10:34 AM
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Email Infrastructure
SMTP Credentials for Email Domains
Create, manage, reset, and delete SMTP credentials for your dedicated email domain — plus ports, limits, pricing, and IMAP notes.
What You'll Learn
To use the SMTP server, you need credentials tied specifically to your dedicated sending domain. Each domain has its own set of SMTP credentials — they are not shared across domains or at the agency level.
This article covers how to create, reset, and delete SMTP credentials; which ports are supported; email and credential limits; pricing; and where to find IMAP settings for receiving email.
Table of Contents
Video Walkthrough
1How to Create SMTP Credentials
SMTP credentials are created at the sub-account level under a dedicated domain — not at the agency level, and not for agency-assigned domains.
Step 1
Navigate to Sub-account Settings
Go to Email Service → SMTP Service → Dedicated Domain and IP → SMTP Settings under your dedicated domain.
Buttons and menus referenced
sub-account levelCreate New SMTP UserReset PasswordDeletefive SMTP credentials1,500 emails per day$0.675 per 1,000 emailsAgency View → Billing → Credits587 with STARTTLS
All 2 steps in this procedure
- Contact Support to request SMTP access for your sub-account.
- Include your sub-account ID, the sending domain or subdomain, and a screenshot of the warning message.
Step 2
Create New SMTP User
Click Create New SMTP User and enter a username and password for the credential.
Note — Approval Required
The platform uses an automated approval system for SMTP access. Eligible sub-accounts can create credentials immediately. If your account is not approved, the Create New SMTP User button may be disabled or you may see a warning message.
Buttons and menus referenced
sub-account levelCreate New SMTP UserReset PasswordDeletefive SMTP credentials1,500 emails per day$0.675 per 1,000 emailsAgency View → Billing → Credits587 with STARTTLS
All 2 steps in this procedure
- Contact Support to request SMTP access for your sub-account.
- Include your sub-account ID, the sending domain or subdomain, and a screenshot of the warning message.
Buttons and menus referenced
sub-account levelCreate New SMTP UserReset PasswordDeletefive SMTP credentials1,500 emails per day$0.675 per 1,000 emailsAgency View → Billing → Credits587 with STARTTLS
All 2 steps in this procedure
- Contact Support to request SMTP access for your sub-account.
- Include your sub-account ID, the sending domain or subdomain, and a screenshot of the warning message.
Your SMTP Settings
| SMTP Server Address | smtp.mailgun.org |
| Secure Connection | TLS/SSL (based on your mail client or SMTP plugin) |
| SMTP Username | YourGivenName@DomainName.com |
| SMTP Password | YourGivenPassword |
| SMTP Ports | 25, 465 (SSL/TLS), 587 (STARTTLS), 2525 |
2What Ports Does Mailgun Support?
The SMTP server (smtp.mailgun.org) listens on the following ports:
| Port | Protocol | Use When |
|---|---|---|
| 25 | Standard SMTP | Server-to-server relaying (often blocked by ISPs for client use) |
| 465 | SSL/TLS | Clients requiring implicit TLS from the start of the connection |
| 587 | STARTTLS | Recommended for most email clients and SMTP plugins |
| 2525 | Alternative SMTP | Fallback when ports 25, 465, and 587 are blocked |
3How to Reset SMTP Password
To reset the password for an existing SMTP credential, locate the credential in your domain's SMTP Settings and click the reset option. In the confirmation modal, click Reset Password to finalize the change.
Buttons and menus referenced
sub-account levelCreate New SMTP UserReset PasswordDeletefive SMTP credentials1,500 emails per day$0.675 per 1,000 emailsAgency View → Billing → Credits587 with STARTTLS
All 2 steps in this procedure
- Contact Support to request SMTP access for your sub-account.
- Include your sub-account ID, the sending domain or subdomain, and a screenshot of the warning message.
Initiate the password reset from the SMTP credential row
Buttons and menus referenced
sub-account levelCreate New SMTP UserReset PasswordDeletefive SMTP credentials1,500 emails per day$0.675 per 1,000 emailsAgency View → Billing → Credits587 with STARTTLS
All 2 steps in this procedure
- Contact Support to request SMTP access for your sub-account.
- Include your sub-account ID, the sending domain or subdomain, and a screenshot of the warning message.
Confirm the reset in the pop-up modal
4How to Delete SMTP Credential
To remove an SMTP credential, locate it in your domain's SMTP Settings and click Delete. Confirm the deletion in the pop-up modal.
Buttons and menus referenced
sub-account levelCreate New SMTP UserReset PasswordDeletefive SMTP credentials1,500 emails per day$0.675 per 1,000 emailsAgency View → Billing → Credits587 with STARTTLS
All 2 steps in this procedure
- Contact Support to request SMTP access for your sub-account.
- Include your sub-account ID, the sending domain or subdomain, and a screenshot of the warning message.
Click Delete on the SMTP credential row
Buttons and menus referenced
sub-account levelCreate New SMTP UserReset PasswordDeletefive SMTP credentials1,500 emails per day$0.675 per 1,000 emailsAgency View → Billing → Credits587 with STARTTLS
All 2 steps in this procedure
- Contact Support to request SMTP access for your sub-account.
- Include your sub-account ID, the sending domain or subdomain, and a screenshot of the warning message.
Confirm deletion in the modal
5Limits for SMTP and Emails
SMTP Credential Limit
5 credentials per dedicated domain
A maximum of five SMTP credentials can be created for each dedicated domain.
Daily Email Limit
1,500 emails per day per account
Each account is limited to 1,500 emails per day.
Important
If the daily email limit is exceeded, all SMTP credentials will be automatically deleted from all dedicated domains on the account.
6LC Email Pricing
LeadConnector email is priced at $0.675 per 1,000 emails — lower than most major SMTP providers (Mailgun charges $0.80/1,000). All plans use the same per-email rate.
Email charges are deducted from your account credits and can be reviewed at Agency View → Billing → Credits.
7Where to Find IMAP Settings
Not Supported
Since mailboxes are not hosted here, POP and IMAP protocols are not supported. SMTP credentials cannot be used in IMAP settings.
IMAP is used to retrieve messages from your mailbox, while SMTP is for sending. If you need IMAP to read email in a client, you must get those settings from your email hosting provider — not from this platform.
Example — Google Workspace: Generate an app password in Google, then use:
Google IMAP Settings
| Username | Your full email address |
| Password | Your Google app password |
| IMAP Host | imap.gmail.com |
| IMAP Port | 993 |
For other providers, find IMAP settings in their own support documentation. Quick links:
If your provider isn't listed, contact them directly for IMAP hostname and port information.
Common IMAP Reference
| Provider | IMAP Host | IMAP Port |
|---|---|---|
| Google / Gmail | imap.gmail.com | 993 |
| Verizon | imap.verizon.net | 995 |
| AOL | imap.aol.com | 993 |
8Troubleshooting
Issue
"Unable to Create SMTP User" — button is disabled or a warning banner appears
This means SMTP credentials cannot be created for that domain at this time. This is controlled by an automated approval system. Eligible accounts get access immediately; others require manual review.
What to do:
- Contact Support to request SMTP access for your sub-account.
- Include your sub-account ID, the sending domain or subdomain, and a screenshot of the warning message.
9Frequently Asked Questions
Q: Why am I seeing "SMTP Credential creation is blocked. Please contact support"?
This appears when your account has hit usage thresholds or has been flagged by internal controls to prevent abuse — commonly triggered by exceeding the 1,500 emails/day limit. Contact support with your sub-account ID to have the block reviewed and resolved.
Q: Can I create SMTP credentials at the agency level?
No. SMTP credentials are created at the sub-account level only, and only under a dedicated domain — not agency-assigned domains.
Q: What happens to my SMTP credentials if I exceed the daily email limit?
All SMTP credentials will be automatically deleted from all dedicated domains on the account. You will need to re-create them once your account is back within limits.
Q: Which port should I use for my email client or WordPress SMTP plugin?
Port 587 with STARTTLS is the recommended choice for most email clients and SMTP plugins. Use port 465 if your client requires implicit TLS. Port 2525 is a reliable fallback if the others are blocked by your host or ISP.
Q: Can I use SMTP credentials to receive email (IMAP/POP)?
No. SMTP credentials are for sending only. Mailboxes are not hosted here, so POP and IMAP are not supported. For receiving email, use the IMAP settings provided by your email hosting provider (e.g., Google Workspace, Outlook, etc.).
Q: How many SMTP credentials can I create per domain?
Up to five SMTP credentials can be created per dedicated domain.
Q: Are BCC recipients counted toward the daily email limit?
Yes. All recipients — To, CC, and BCC — are each counted and charged individually. A single email sent to 3 recipients (1 To, 1 CC, 1 BCC) counts as 3 emails toward both the daily limit and billing.
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