current set of stats from /var/log/exim4/rejectlog* files Mostly looking quite good, covering period: 2017-08-04T06:41:39-0700--2017-08-15T06:15:48-0700
2017-08-15T06:15:48-0700 2017-08-04T06:41:39-0700 10 23:34:09 $ echo '1870/(10*24+23+34/60+09/3600)' | bc -l 7.09491183528675268667 So ... rejecting(+delaying) about 7 spams per hour. And most all legitimate rejections, and thus far not seeing any general mass spam to have made it through ... at least yet.
total: 1883 rejected (or greylisted 20/1883) sub-totals: 1870 legitimately rejected (or delayed with greylisting) 13 false positive - but only 1 original, 12 more to diagnose issue
summary analysis: 902 auth_server_login authenticator failed 733 HELO *.* (invalid) 99 SMTP protocol synchronization error 66 too many nonmail commands 20 greylisted 14 Too many connections within a 5 minute period (Maximum of 40 allowed.) 12 URL ending in .pm (false positives and work to isolate and correct) 12 Sender ... @temp.balug.org attempting to use forged local or relay 12 Bounced undeliverable notification rejected 9 Relaying from 2 Scam text in body 1 no valid sender in any header line (bad MTA or configuration thereof) 1 Too many consecutive failed deliveries from sender (I DoSed myself)
From: "Michael Paoli" Michael.Paoli@cal.berkeley.edu To: balug-admin@lists.balug.org Subject: Re: [BALUG-Admin] BALUG lists ... work-around text: blank body with command in Subject: header, & anti-spam Date: Wed, 19 Jul 2017 23:44:21 -0700
And, anti-spam looking quite good. Quite few false-positives (at least after some earlier configuration adjustments). Whole lot 'o crud spam being rejected ... Looking at logs, 5,384 rejections (but note that some of those are soft-fails, e.g. greylisting) in 10d 10h 34m 3s, that gives us: about 21.5 rejections/hr., or about a rejection every 2.8 minutes. Don't think I've seen a single actual spam email make it through ... yet.
So, thus far, pretty dang good results on the anti-spam.
5384 2017-07-19 23:13:57 2017-07-09 12:39:54 10 10:34:03 5384/(24*3600*10+3600*10+34*60+3)*3600 21.48722400151655740800 1/(5384/(24*3600*10+3600*10+34*60+3)*60) 2.79235698365527488942