Hi All, Just spec'ing out some stuff with our corporate gateway mail relay. It is currently running FreeBSD 4.6, sendmail, inflex, spamassassin - the usual mail-gateway stuff. It's a Compaq Proliant box with a P3-866 and 256Mb RAM, with a RAID 0/1 (Compaq Smart Array2 IIRC).
We are running into problems when we get a flood of messages (>50/minute) as the whole mail filtering/scanning thing quickly chews up all CPU time sending the system load to >15 which causes sendmail to start refusing connections. Obviously this is a problem. We can't up-spec the box due to bean-counter constraints, so I'm looking at replacing this convoluted sendmail+inflex+ripmime+spamassassin with a more elegant Exim+mailscanner (http://www.sng.ecs.soton.ac.uk/mailscanner/). The specific needs we have are: 1. Mail relay for approx 12 domains 2. Content detection (magic number etc) for DOS/Win32 binaries etc. 3. Virus scanning (we use NAI VirusScan Enterprise) 4. Spam filtering (currently SpamAssassin) Would Exim+mailscanner have a lower overhead compared to our current setup? Would Linux (Debian or RedHat are current candidates) provide better task and/or resource management? Are there other alternatives (Postfix, Qmail etc) that people have experience with? We currently pump 10,000+ messages and 6Gbytes+ a day through our mail gateway. Thanks in advance :-) --James -- SLUG - Sydney Linux User's Group - http://slug.org.au/ More Info: http://lists.slug.org.au/listinfo/slug
