554 return code is encountered when sending outbound emails to Trend Micro™ Email Security

Product / Version includes:

Trend Micro Email SecurityAll

Last updated: 2024/12/26

Solution ID: KA-0008648

Category: Troubleshoot

Summary

This issue happens in the following situations:

Outbound emails bounced
A mail server is set to relay the outbound emails to Trend Micro Email Security but fails and rejects the emails. It then displays the following error:

554 5.7.1 <recipient address>: Recipient address rejected: NO-DOMAIN.

554 5.7.1 <recipient address>: Recipient address rejected: Sender IP not allowed.

When checking the Mail Tracking Logs, you will see "Sender IP not allowed" as the Blocked Reason for outbound mails.

This issue occurs if the outbound IP address for the domain is not added. Only the IP addresses configured as outbound servers for a particular configured domain are allowed to send emails through the Trend Micro Email Security relay email servers.

Follow these steps to resolve the issue:

Log on to the Trend Micro Email Security web console then go to Domains page.
Click the related domain which will send the outbound mails to Trend Micro Email Security.
Make sure that Enable outbound protection is checked.
Specify all the IP addresses of your outbound servers in the Outbound Servers configuration for that domain so that Trend Micro Email Security can accept emails messages from these servers.

Was this article helpful?

Featured

Automation Center

Education Portal

Online Help Center

Service Status

TrendConnect

554 return code is encountered when sending outbound emails to Trend Micro™ Email Security

554 return code is encountered when sending outbound emails to Trend Micro™ Email Security

Product / Version includes:

Summary