Message receives an "Unscannable due to limits exceeded" verdict

Products

• Messaging Gateway

Issue/Introduction

One or more email messages receive the verdict "Unscannable due to limits exceeded".

Resolution

The verdict “Unscannable for Malware or Content Filtering due to limits exceeded” is typically triggered when a message’s attachment exceeds the container limits configured in Protocols > SMTP > Settings > Content Scanning. 

To reduce the chance of legitimate messages becoming unscannable due to these thresholds, It is recommend adjusting the current limits (if still set to default values) as follows:

• Maximum individual file size when opened: Increase from 100 MB to 200 MB

• Maximum accumulated file size when opened: Increase from 200 MB to 300 MB