Messaging Gateway error: Spamhunter module: Failure applying body regex rules.

Products

• Messaging Gateway

Issue/Introduction

When reviewing the Brightmail Engine logs in Messaging Gateway you find the follow pairs of error messages logged within one second of each other:

• Spamhunter module: Failure applying body regex rules.
• DNS TXT query for "<hexnumber>.<domain>" failed unexpectedly.

Cause

This is caused by the URL reputation filtering feature receiving an error when attempting to look up the reputation score of a URL in an email message that is being scanned.

Resolution

Workaround:

Disable URL reputation filtering in the SMG control center (Spam -> Scan Settings) Uncheck "Enable URL Reputation filtering" and click Save.

Recommended:

• Verify DNS settings for the SMG are set to internal DNS servers by IP address.
• Configure the internal DNS server to allow more connections from the IP address of the SMG.
• Allow more bandwidth to the DNS server.
• Verify that DNS traffic over port 53 is not blocked, throttled, or shaped in any way.