Corrupt archives keep getting blocked by GFI MailEssentials.
all supported environments
Open the GFI MailEssentials configuration
Expand the Content Filtering > Decompression engine
Select "Check corrupted archives"
Uncheck "Check corrupted archives" and hit "Apply"
This is the main filter that scans for corrupt archive files. It is designed to filter and block any attachments that might be potentially harmful.
Please take caution when disabling any filters as this can be considered a security risk.