How to Diagnose Business Email Rejections Caused by Attachment Types

Email gateways may reject certain file types or containers even when the message size is within limits.

Checks to make

Capture the non-sensitive rejection notice, compare delivery with a permitted test file, and check sender and recipient policies. Use an approved secure file-sharing method for blocked content rather than renaming a file to bypass security controls.

When to get help

Email operations support can identify policy-based rejection and safe alternatives. Informatix Systems can assess the symptoms, evidence, and next steps. Contact Informatix Systems to discuss this issue.