Don’t disagree …as the topic was spam filtering, I forgot about the AV component …
For me, I find the RBL’s take out about 60-70% of the crap before it hits mail servers still – I still find greylisting effective but it requires more and more “babysitting” …. Yes, they are both “older measures” but still find they work well – but as only part of the complete picture. From: Af [mailto:[email protected]] On Behalf Of Ken Hohhof Sent: Wednesday, April 1, 2015 7:17 PM To: [email protected] Subject: Re: [AFMUG] open source email spam filter So much spam now comes from accounts with compromised credentials (via SMTP AUTH or webmail), I think both RBLs and greylisting are somewhat outdated techniques, don’t expect them to be as effective as in 1995 or 2005. Use them if you wish to reduce the load on your mail filter, but you aren’t going to achieve acceptable performance without a good content based filter. Plus customers expect virus filtering which is going to require an anti-virus scanner. From: Paul Stewart <mailto:[email protected]> Sent: Wednesday, April 01, 2015 5:55 PM To: [email protected] <mailto:[email protected]> Subject: Re: [AFMUG] open source email spam filter Spamassassin combined with RBL’s and greylisting … if you implement greylisting you’ll want to whitelist some systems (like Amazon EWS for example where this list originates from) From: Af [mailto:[email protected]] On Behalf Of Chuck McCown Sent: Wednesday, April 1, 2015 5:04 PM To: [email protected] <mailto:[email protected]> Subject: Re: [AFMUG] open source email spam filter gmail... From: Tim Reichhart <mailto:[email protected]> Sent: Wednesday, April 01, 2015 2:53 PM To: [email protected] <mailto:[email protected]> Subject: [AFMUG] open source email spam filter Hey Guys Who do you guys use for spam filter like barracuda but in open source for your email server? Tim
