Question Block zip files on mail server

[asgeir abramsen]

Hello, we're receiving a lot of spam, phising and virus-emails. Is there a way to block all emails containing zip files? We have spamassassin, but it's not helping enough. Thank you!

 

[UFHH01]

Hi asgeir abramsen,

if you really would like to block/reject "*.zip" - files ( or/and *.exe, *.bat - files ), you can reach that goal for example with postfix:

1. Edit /etc/postfix/main.cf
   1. Add for example: mime_header_checks = regexp:/etc/postfix/block_unwanted_attachments
2. save "main.cf"
3. Create the file "/etc/postfix/block_unwanted_attachments" with the content:

   /name=[^>]*\.(bat|exe|zip)/ REJECT

4. reload postfix with the command: service postfix reload

 

[oscarirasysnet]

It doesn't work in names of attachments that are encoded as UTF-8.