Venilton de Carvalho Junior wrote:
Hie All, I have a FreeBSD runing qmail+qmail-scanner. I notice that in my server are passing to many emails with empty subject and some of them are probably virus. I know that i can block strings in Subjects, Headers, Mail from and Rcp to. But what is the wildcard to empty strings?
Try
^$<TAB>Virus-Subject:<TAB>Blank Subject lines not allowed per Company security policy
But it won't cover a Subject line containing spaces, and conversely it will also block mail *without* a Subject: header (which may be OK by you...)
Jason
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