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[Info] Zimbra/Email: banned attachements

Added by Carsten Rose over 7 years ago

Dear all

during the last weeks different computer attacks, based on various attachments in mails, have been noticed. Especially javascript based Ransomware attacks (your files will be encrypted and you have to pay money to get them back).

Therefore we decided to block Mails with suspect email attachments.
The banned attachment types are not used in daily bussiness. Every time if a mail with such an attachment is detected, you and the sender receive an automatic notification email with the topic:

BANNED contents ... in mail TO YOU from ...

The original mail with the attachment is not accessible for you.

If you receive such a notification, please check the sender address:

- known sender: ask the sender to send the attachment in a different format .
- unknown sender: there is a huge chance that the email is an attack. Typically you can delete such notifications.

Thanks a lot.

CU
Carsten

Banned attachments: ade, adp, bat, chm, cmd, com, cpl, exe, hta, isp, jar, js, jse, lib, lnk, mde, msc, msp, mst, pif, scr, sct, shb, sys, vb, vbe, vbs, vxd, wsc, wsf, wsh


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