Re: spam filtering

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John Summerfied wrote:
Justin Zygmont wrote:

hi, I was using postfix and was wondering what the best method would be to discard all messages that have been marked as spam in the subject line. I guess spamassassin just prosesses email, but doesnt remove them, has anyone setup procmail with postfix to work well?


I run postfix, spamassassinn & imap on the server. I use blocklists to reject known spam sites, postfix header checks to block misconfigured mail servers (eg the helo name must be well-formed and resolve) and SA to mark up probable/possible spam.

Here's the sort of drivel I drop with the header checks:
errors in HELO/EHLO conversation:
211-74-214-117.adsl.dynamic.seed.net.tw[211.74.214.117] : Helo command rejected (need fully-qualified hostname) : 1 Time(s) 59-104-101-121.adsl.dynamic.seed.net.tw[59.104.101.121] : Helo command rejected (need fully-qualified hostname) : 1 Time(s) CPE-72-128-63-194.kc.res.rr.com[72.128.63.194] : Helo command rejected (need fully-qualified hostname) : 1 Time(s) ProxyBox.office.lan[192.168.1.249] : Helo command rejected (need fully-qualified hostname) : 1 Time(s) c-24-1-182-201.hsd1.tx.comcast.net[24.1.182.201] : Helo command rejected (need fully-qualified hostname) : 1 Time(s) i577B174B.versanet.de[87.123.23.75] : Helo command rejected (need fully-qualified hostname) : 1 Time(s) l3-202-89-184-225.arach.net.au[202.89.184.225] : Helo command rejected (need fully-qualified hostname) : 2 Time(s) mail2.californiapsychicsemail.com[63.236.1.34] : Helo command rejected (need fully-qualified hostname) : 1 Time(s) p4122-ipad48sasajima.aichi.ocn.ne.jp[222.144.151.122] : Helo command rejected (need fully-qualified hostname) : 1 Time(s) pcp03515179pcs.strl1201.mi.comcast.net[68.61.205.130] : Helo command rejected (need fully-qualified hostname) : 1 Time(s) ppp85-140-44-177.pppoe.mtu-net.ru[85.140.44.177] : Helo command rejected (need fully-qualified hostname) : 1 Time(s) unknown[195.34.115.117] : Helo command rejected (need fully-qualified hostname) : 1 Time(s) unknown[211.212.237.201] : Helo command rejected (need fully-qualified hostname) : 1 Time(s) unknown[211.61.156.189] : Helo command rejected (need fully-qualified hostname) : 1 Time(s) unknown[220.73.115.116] : Helo command rejected (need fully-qualified hostname) : 1 Time(s) unknown[222.67.32.64] : Helo command rejected (need fully-qualified hostname) : 1 Time(s) unknown[61.48.185.187] : Helo command rejected (need fully-qualified hostname) : 1 Time(s)


Unrecognized warning:
smtpd_peer_init: 201.130.66.175: hostname host064175.metrored.net.mx verification failed: Name or service not known : 1 Time(s) smtpd_peer_init: 202.74.166.202: hostname cust202.166.rwa.globaldial.com verification failed: Name or service not known : 11 Time(s) smtpd_peer_init: 210.193.161.27: address not listed for hostname ecm7.com : 2 Time(s) smtpd_peer_init: 212.90.202.145: hostname cn-zh-aar-212-90-202-145.cybernet.ch verification failed: Name or service not known : 1 Time(s) smtpd_peer_init: 213.141.159.53: hostname nat-altair53.nebynet.ru verification failed: Name or service not known : 1 Time(s) smtpd_peer_init: 61.95.110.106: hostname dsl-61-95-110-106.request.com.au verification failed: Name or service not known : 1 Time(s) smtpd_peer_init: 63.206.157.134: hostname 63-206-157-134.ded.pacbell.net verification failed: Name or service not known : 1 Time(s) unknown[195.34.115.117] sent non-SMTP command: From: "Robert Jones" <krgpzp@xxxxxxxxxxxxxxx> : 1 Time(s)


Some days this list rivals mail blocked via block lists.



--

Cheers
John

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