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feature request [message #110] Tue, 27 June 2006 03:04 Go to previous message
Messages: 19
Registered: June 2006
Junior Member

I'd like to see the following features implemented:

1. Being able to specify that the Attachment Filter delete e-mails containing attachments whose extension ends in a period (eg somefile.exe.). It's impossible to rename a file to be like this on a Windows system, therefore only viruses use these types of files in order to defeat extension matching.

2a. A new filter for Zip files (and being able to handle other common compressions maybe) so that any password-protected archives are redirected to a specific e-mail address. Some viruses send themselves in password protected archives, and include their password in the e-mail body, so it's no issue for the recipient to open and activate the virus - but no virus scanner can scan the files for viruses. This e-mail address would be set up to point to a holding mailbox so that legitimate e-mails can be onforwarded once their contents have been determined.

2b. An alternative would be to have a new filter that tries every word contained in the body of the e-mail to uncompress the archive. If one of the words succeeds, then this is virtually guaranteed to be a virus, as there is no sense in anyone sending a legitimate password-protected archive along with the password.
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