Email attachment blocked: file type not allowed

The attachment file extension is included in the 'glide.email.attachment.blocked_extensions' system property which contains a comma-separated list of restricted file types. (high likelihood)

The attachment has a potentially dangerous file extension like .exe, .bat, .scr, or .vbs that is blocked by default security settings to prevent malware transmission. (high likelihood)

A custom business rule or script is adding additional file type restrictions beyond the standard system property configuration. (medium likelihood)

The file extension is being incorrectly detected due to multiple extensions or unusual file naming conventions that trigger the security filter. (low likelihood)

Step 1: Navigate to System Properties > All Properties and search for 'glide.email.attachment.blocked_extensions' to view the current list of blocked file extensions.

Step 2: Check the System Log at System Diagnostics > Log > Application Log to identify the specific file extension that triggered the block and the email notification involved.

Step 3: Verify the attachment file extension against the blocked extensions list to confirm it matches one of the restricted types.

Step 4: If the file type should be allowed, modify the 'glide.email.attachment.blocked_extensions' system property by removing the problematic extension from the comma-separated list.

Step 5: Review any custom business rules on the Email table or related notification tables that might implement additional file type restrictions.

Step 6: Test the email notification by manually triggering it or waiting for the next scheduled send to verify the attachment now processes successfully.

Step 7: Monitor the System Log after changes to ensure no new security vulnerabilities are introduced by allowing previously blocked file types.