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Mailgun Invalid domain

The domain used in the email is not verified or is incorrect.

Resolving 'Invalid Domain' Issues in Mailgun

Understanding Mailgun

Mailgun is a powerful Email Communication API provider that allows developers to send, receive, and track emails effortlessly. It is widely used for transactional emails, newsletters, and other email-based communications in applications.

Identifying the Symptom

When using Mailgun, you might encounter an 'Invalid domain' error. This typically manifests as a failure to send emails, with error messages indicating that the domain is not recognized or is incorrect.

Common Error Messages

  • 'Domain not found'
  • 'Invalid domain'
  • 'Domain is not verified'

Understanding the Issue

The 'Invalid domain' error occurs when the domain you are attempting to use with Mailgun is either not verified or incorrectly configured. This can happen if the domain was not added to your Mailgun account or if DNS settings are not properly set up.

Root Causes

  • The domain is not added to your Mailgun account.
  • The domain is added but not verified.
  • DNS records are not correctly configured.

Steps to Fix the Issue

To resolve the 'Invalid domain' error, follow these steps:

Step 1: Verify Domain in Mailgun

  1. Log in to your Mailgun dashboard.
  2. Navigate to the 'Domains' section.
  3. Check if your domain is listed. If not, add your domain.
  4. If the domain is listed but not verified, click on it to view the verification instructions.

Step 2: Configure DNS Settings

  1. Access your domain's DNS settings through your domain registrar.
  2. Add the required DNS records provided by Mailgun. These usually include TXT, MX, and CNAME records.
  3. Ensure that the records are correctly entered and saved.
  4. It may take some time for DNS changes to propagate.

Step 3: Confirm Verification

  1. Return to the Mailgun dashboard and check the domain status.
  2. Once DNS records are verified, the domain status should change to 'Verified'.

Additional Resources

For more detailed guidance, refer to the Mailgun Quickstart Guide and the Domain Verification Documentation.

By following these steps, you should be able to resolve the 'Invalid domain' error and ensure smooth email operations with Mailgun.

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