Domain Not Allowed

Error Message

Error: Mail command failed: 550 5.7.1 Sending from domain is not allowed

This error occurs when you try to send an email using SMTP with a domain that doesn't match your verified domain in Mailtrap.

Common Causes

1. Domain Mismatch

You're sending an email with FROM: {anything}@mydomain.com, but in Mailtrap, you've verified anotherdomain.com.

The verified domain and FROM domain in your emails must match.

If you verified example.com in Mailtrap, you can only send emails from *@example.com addresses.

2. Domain Not Verified or Compliance Check Failed

Your domain might not be fully verified, or you haven't passed the Compliance Check.

How to Fix

1

Check Your Verified Domains

Go to Sending Domains in your Mailtrap account.

2

Verify Domain Status

Look for the Verified badge next to your domain. If you don't see it:

1. Click on the domain

2. Check if all DNS records are found by Mailtrap (all should be green)

3. If any records are missing or incorrect, update them with your DNS provider

3

Check Compliance Status

Scroll down to see the Compliance Check status.

If the compliance check hasn't passed:

• Review any additional steps required

• Complete any pending actions

• Wait for the check to complete

4

Update Your FROM Address

Ensure your application sends emails from an address that matches your verified domain:

• Correct: [email protected] (if yourdomain.com is verified)

• Incorrect: [email protected] (if otherdomain.com is not verified)

Related Articles

• Sending Domain Setup

• SMTP Integration

• Unauthorized Error (401 Code)