Lately my server has been getting pounded with spam containing ZIP attachments (presumably infected with something). They go to most of our users, and the fear is someone will open one.
Users are trained to not open attachments without IT Dept's approval, however a technical solution is best since users are fallible.
I need to somehow prevent any email with a ZIP attachment from being delivered to the user, and instead redirect the email + attachment to a centralized email address under control of our IT Team. They will review the emails, and if deemed legitimate, will forward to the intended user.
Looking through Zimbra's configs, it seems I can block ZIP attachments entirely, but this has the unfortunate effect of rejecting sometimes legitimate emails.
How can I achieve this in Zimbra?