> >Competitors like zmailer, qmail, exim and postfix are both faster and
> >supposedly more secure.
> What about anti-virus features? Considering the number of virus coming
> through e-mail, I'd like to find an app that would work with the MTA
> so as to quarantine any suspicious e-mail before users even get the
> chance of d'loading it. BTW, are the above MTAs all open-source?
Well, please have a look at AMaViS (http://aachalon.de/amavis) - it
provides scanning of incoming eMail (attachments). It currently works
with sendmail and qmail.
Ive wrote a small patch for AMaViS to scan incoming and outgoing
eMails. But you need smtpd/smtpfwdd from the Juniper Firewall Toolkit
(www.obtuse.com). My patches can be found at
(its still alpha - so use this patch at your own risk!)
For postfix see the FAQ at http://postfix.merit.edu/faq.html#scanning
A commercial solution could be Trend InterScan VirusWall (still beta),
www.antivirus.com. I know that also an another company is working on a
smtp-store-and-forward proxy with virus scanning capabilities. And
AVPDaemon + AVPMonitor from KasperskyLabs (www.avp.ru) provides
"scanning of the files attached to e-mail messages" (quote from the
website - I did not tested it).
Student of Communication Engineering/Computer Networking, University of