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Proofpoint, Inc.

Outbound mail rejected - 554 5.7.1: Relay access denied

Situation Your outbound mail is rejected with a Relay access denied mail response.
Solution Check various settings in Domain and User Settings using the below instructions.

 

Relay access denied

Why do I keep getting a 554 5.7.1: Relay access denied?

Proofpoint Essentials is a closed relay system. This means that all mail going through the Essentials platform must have a user associated with the platform, whether that be an End-User, alias, or Functional Account.

Resolution

To resolve this issue you will want to check two areas on the platform:

  • Domains
  • Users and Groups

Domains

Check to see if the Domain has relay access turned on. To do this:

  • Navigate to Company Settings > Domains and make sure for the domain the switch is turned on to green.

domain switch.png

Users and Groups

Navigate to Users and Groups section for the below items:

  • Click Users. Make sure the user who is getting the relay access denied message is listed in this section.
  • Click Functional Accounts. If the account is a group or functional account, make sure the account is also listed here.
  • If the user has been SMTP discovered, click SMTP Discovery and check as per SMTP discovery settings

If you just added the user in the last hour or enabled relay on the domain, your changes might have not taken effect. Give any enabled domain or added user 30 to 60 minutes to properly propagate on the platform.

If you still keep getting this error message after trying these steps please contact support.