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To resolve the issue:

Go to the DNS configuration of your domain and create a .TXT record.
Insert the SPF record syntax for TMEMS outbound servers.

For more details on which TMEMS SPF record to use, please refer to Adding SPF records.

Keywords: mail servers blocks TMEMS emails,emails from TMEMS are not received,mails from TMEMS are blocked by mail servers, how to fix TMEMS blocked by mail servers, troubleshooting mail servers blocking TMEMS, fixing blocked TMEMS emails, how to fix TMEMS outbound filtering,

Emails sent via Trend Micro™ Email Security (TMEMS) outbound filtering are blocked by some destination mail servers

Product / Version includes:

Trend Micro Email Security All

Last updated: 2025/09/25

Solution ID: KA-0012526

Category: Troubleshoot

Summary

Some destination mail servers perform Sender Policy Framework (SPF) checking therefore emails sent via TMEMS outbound filtering are getting blocked by those destination mail servers.

To resolve the issue:

Go to the DNS configuration of your domain and create a .TXT record.
Insert the SPF record syntax for TMEMS outbound servers.

For more details on which TMEMS SPF record to use, please refer to Adding SPF records.

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Emails sent via Trend Micro™ Email Security (TMEMS) outbound filtering are blocked by some destination mail servers

Emails sent via Trend Micro™ Email Security (TMEMS) outbound filtering are blocked by some destination mail servers

Product / Version includes:

Summary