Hi Magnus, yes I had exactly same problem. I did discuse it on spamdyke list few months ago. We did found perfect solution and from then I have zero spams where sender-address is same as rcpt to: address. You refering that. Solution is really simple for SPAMDYKE. All what you must do is put all local domains into sender-blacklist-file=/var/qmail/spamdyke/blacklisted_senders
here is content of mine for personal mail server I have two local domains trantor.cz and svarc.biz: @trantor.cz @svarc.biz You must have your local domains prepended with @. SPAMDYKE will from then rejecet these messages, here is example: Dec 15 02:10:19 msi1 spamdyke[6436]: DENIED_SENDER_BLACKLISTED from: lubov...@trantor.cz to: lubov...@trantor.cz origin_ip: 218.212.240.181 origin_rdns: cm181.sigma240.maxonline.com.sg auth: (unknown) I think this is exactly what you looking for. I strongly suggest you add into spamdyke.conf reject-ip-in-cc-rdns ip-in-rdns-keyword-blacklist-file=/var/qmail/ip-in-rdns-keyword-blacklist-file and into ip-in-rdns-keyword-blacklist-file: .net .com .eu .org .info .biz Happy SPAM hunting Eduard Švarc DATA Intertech s.r.o. Kladenská 46 160 00 Praha 6 Czech Republic tel. +420-235365267, fax +420-235361446 Magnus Ringdahl <magnus.ringd...@bolina.hsb.se> wrote on 15.12.2009 21:54:26: > Hi. > I have been using spamdyke for quite some time now, and it reduces my > spammails alot. > But it have a hell of a problem with spammers (often viagra) the spoof > the localdomains. > I often get spammails where the sending address is the same as my > receiving address. > And i dint know how to block them. > > I have pasted my configurationfiles so you coould see if there is some > issues. Using Debian and Plesk 9.2. > > spamdyke.conf > ------------------------------------ > log-level=verbose > filter-level=normal > local-domains-file=/var/qmail/control/rcpthosts > max-recipients=20 > idle-timeout-secs=60 > graylist-level=only > graylist-dir=/var/qmail/spamdyke/greylist > graylist-min-secs=300 > graylist-max-secs=1814400 > > sender-whitelist-file=/var/qmail/spamdyke/whitelisted_senders > rdns-whitelist-file=/var/qmail/spamdyke/whitelisted_rdns > ip-whitelist-file=/var/qmail/spamdyke/whitelisted_ip > > sender-blacklist-file=/var/qmail/spamdyke/blacklisted_senders > recipient-blacklist-file=/var/qmail/spamdyke/blacklisted_recipients > ip-blacklist-file=/var/qmail/spamdyke/blacklisted_ip > dns-blacklist-entry=zen.spamhaus.org > > reject-empty-rdns > reject-unresolvable-rdns > greeting-delay-secs=5 > reject-missing-sender-mx > > policy-url=http://www.your-domain-here.com/spam_policy > -------------------------------------------------------------------- > > smtp_psa > -------------------------------------------------- > service smtp > { > socket_type = stream > protocol = tcp > wait = no > disable = no > user = root > instances = UNLIMITED > env = SMTPAUTH=1 > server = /var/qmail/bin/tcp-env > server_args = -Rt0 /usr/local/bin/spamdyke -f > /etc/spamdyke.conf /var/qmail/bin/relaylock /var/qmail/bin/qmail-smtpd > /var/qmail/bin/smtp_auth /var/qmail/bin/true /var/qmail/bin/cmd5checkpw > /var/qmail/bin/true > } > --------------------------------------------------------- > > The whitelisted_ip file contains the mailservers ip-addresses. > The blacklisted_senders file contains the localdomains (@domain.tld). > The blacklisted_words contains alot of words like .t-dialin.net, > .t-ipconnect.de, .in-addr.arpa, .dhcp, .net, in-addr.arpa, dhcp, > dynamic, and so on. > > I understand the spamdyke filters that they work something like this. If > the sending server is listed in whitelisted_ip the mail passes the > filter. If its not listed in whitelisted_ip it then checks the > blabklisted_senders if the sending address is listed it drops the mail. > Is that correct? > > Here is a sample of the mail.log of a spammail that in my opinion should > have been dropped but passes all filters. > > Dec 15 17:52:55 web01 spamdyke[24928]: TLS_ENCRYPTED from: (unknown) to: > (unknown) origin_ip: 80.179.197.221 origin_rdns: > 80.179.197.221.cable.012.net.il auth: (unknown) > Dec 15 17:52:56 web01 qmail-queue-handlers[24946]: Handlers Filter > before-queue for qmail started ... > Dec 15 17:52:56 web01 qmail-queue-handlers[24946]: > from=vioirecyf8...@012.net.il > Dec 15 17:52:56 web01 qmail-queue-handlers[24946]: to=i...@domain.tld > Dec 15 17:52:56 web01 spf filter[24947]: Starting spf filter... > Dec 15 17:52:56 web01 spf filter[24947]: SPF result: neutral > Dec 15 17:52:56 web01 spf filter[24947]: SPF status: PASS > Dec 15 17:52:56 web01 qmail: 1260895976.491935 new msg 4252544 > Dec 15 17:52:56 web01 qmail: 1260895976.491935 info msg 4252544: bytes > 2246 from <vioirecyf8...@012.net.il> qp 24948 uid 2020 > Dec 15 17:52:56 web01 qmail-local-handlers[24949]: Handlers Filter > before-local for qmail started ... > Dec 15 17:52:56 web01 qmail-local-handlers[24949]: > from=vioirecyf8...@012.net.il > Dec 15 17:52:56 web01 qmail-local-handlers[24949]: to=i...@domain.tld > Dec 15 17:52:56 web01 qmail-local-handlers[24949]: mailbox: > /var/qmail/mailnames/domain.tld/info > Dec 15 17:52:56 web01 qmail: 1260895976.515935 starting delivery 2744: > msg 4252544 to local 9-i...@domain.tld > Dec 15 17:52:56 web01 qmail: 1260895976.515935 status: local 1/10 remote > 0/20 > Dec 15 17:52:56 web01 qmail: 1260895976.523935 delivery 2744: success: > did_0+0+2/ > Dec 15 17:52:56 web01 qmail: 1260895976.523935 status: local 0/10 remote > 0/20 > Dec 15 17:52:56 web01 qmail: 1260895976.523935 end msg 4252544 > > Dec 15 21:22:57 web01 /var/qmail/bin/relaylock[6350]: > /var/qmail/bin/relaylock: mail from 125.25.15.31:52521 > (125.25.15.31.adsl.dynamic.totbb.net) > Dec 15 21:22:59 web01 spamdyke[6349]: TLS_ENCRYPTED from: (unknown) to: > (unknown) origin_ip: 125.25.15.31 origin_rdns: > 125.25.15.31.adsl.dynamic.totbb.net auth: (unknown) > Dec 15 21:23:01 web01 qmail-queue-handlers[6354]: Handlers Filter > before-queue for qmail started ... > Dec 15 21:23:02 web01 qmail-queue-handlers[6354]: from=kundtja...@domain.tld > Dec 15 21:23:02 web01 qmail-queue-handlers[6354]: to=kundtja...@domain.tld > Dec 15 21:23:02 web01 spf filter[6355]: Starting spf filter... > Dec 15 21:23:02 web01 spf filter[6355]: Error code: (2) Could not find a > valid SPF record > Dec 15 21:23:02 web01 spf filter[6355]: Failed to query MAIL-FROM: No > DNS data for 'domain.tld'. > Dec 15 21:23:02 web01 spf filter[6355]: SPF result: none > Dec 15 21:23:02 web01 spf filter[6355]: SPF status: PASS > Dec 15 21:23:02 web01 qmail-queue[6356]: scan: the > message(drweb.tmp.Wu6OR3) sent by kundtja...@domain.tld to > kundtja...@domain.tld is passed > Dec 15 21:23:02 web01 qmail: 1260908582.819935 new msg 4253887 > Dec 15 21:23:02 web01 qmail: 1260908582.819935 info msg 4253887: bytes > 2469 from <kundtja...@domain.tld> qp 6357 uid 2020 > Dec 15 21:23:02 web01 qmail-local-handlers[6358]: Handlers Filter > before-local for qmail started ... > Dec 15 21:23:02 web01 qmail-local-handlers[6358]: from=kundtja...@domain.tld > Dec 15 21:23:02 web01 qmail-local-handlers[6358]: to=kundtja...@domain.tld > Dec 15 21:23:02 web01 qmail-local-handlers[6358]: mailbox: > /var/qmail/mailnames/domain.tld/kundtjanst > Dec 15 21:23:02 web01 qmail: 1260908582.855935 starting delivery 2998: > msg 4253887 to local 98-kundtja...@domain.tld > Dec 15 21:23:02 web01 qmail: 1260908582.855935 status: local 1/10 remote > 0/20 > Dec 15 21:23:02 web01 qmail: 1260908582.859935 delivery 2998: success: > did_0+0+2/ > Dec 15 21:23:02 web01 qmail: 1260908582.859935 status: local 0/10 remote > 0/20 > Dec 15 21:23:02 web01 qmail: 1260908582.859935 end msg 4253887 > > How can i check that smtp_auth is working? Im starting to wonder that > it's not. > I hope someone have the time to answer. I have been struggling with this > for a long time withput getting rid of those annoying mails. > > Kind Regards > M > > > Eduard Svarc skrev: > > > > Hello, > > > > these keywords .net and .com are used just for testing if IP is in > > reverse DNS listed. Is not done against normal reverse DNS records for > > servers like mail.somedomain.net. So in combination with keyword > > reject-ip-in-cc-rdns and .net in file > > /etc/spamdyke/ip-in-rdns-keyword-blacklist-file it will reject mail > > from 242-29-179-94.pool.ukrtel.net because that sender will be > > positively tested as not valid reverse DNS. > > > > use just net without that '.' is not suficient because SPAMDYKE use > > this '.' as flag for testing end of string only. So listing .com and > > .net does magic for SPAMDYKE when it testing IP in reverse DNS for > > country code DNS, like .it,, .uk etc it does same for .com and .net. > > Personally I did add into that file other ones special domains like > > .eu, .org, .info, .biz. These should not be used by ISP providers for > > assigning reverse names, but who knows. Anyway it doesn't hurt my > > configuration and I'm preparded. > > > > Eduard Švarc > > > > DATA Intertech s.r.o. > > Kladenská 46 > > 160 00 Praha 6 > > Czech Republic > > tel. +420-235365267, fax +420-235361446 > > > > spamdyke-users-boun...@spamdyke.org wrote on 14.12.2009 09:55:45: > > > > > thanks Eduard Švarc > > > > > > Same query as david stiller raised, .com, .net are valid domain right? > > > > > > also > > > > > > @400000004b25fa572bd181a4 CHKUSER accepted rcpt: from <fx...@bmelaw. > > > com::> remote <microsof-7b1919:unknown:94.179.29.242> rcpt > > > <validdomainu...@mydomain.com> : found existing recipient > > > @400000004b25fa572bd2316c spamdyke[27021]: ALLOWED from: > > > fx...@bmelaw.com to: validdomainu...@mydomain.com origin_ip: 94.179. > > > 29.242 origin_rdns: 242-29-179-94.pool.ukrtel.net auth: (unknown) > > > > > > the above ip is listed in rbl , > > > > > > IP Address Lookup > > > > > > > > [image removed] > > > > > > 94.179.29.242 is not listed in the SBL > > > 94.179.29.242 is listed in the PBL, in the following records: > > > PBL239543 > > > 94.179.29.242 is not listed in the XBL > > > > > > > > > > > > > > > > > this doesnt look like false positive > > > > > > From: Eduard Svarc <esv...@intertech.cz> > > > To: spamdyke users <spamdyke-users@spamdyke.org> > > > Sent: Mon, December 14, 2009 12:48:07 PM > > > Subject: Re: [spamdyke-users] spamdyke configuration finetuneing > > > > > > > > > Hello, > > > > > > I see you have two things out. 1st you using RBLS, that could give > > > you a lot positive false spam. 2nd you completely have commented out > > > best thing in SPAMDYKE. Is sniffing IPs in reverse DNS. Most of bots > > > and spams comming from Internet zombies. Here are my advices: > > > > > > 1 - comment out dns-blacklist-entry=zen.spamhaus.org > > > 2 - uncoment reject-empty-rdns, reject-ip-in-cc-rdns, reject- > > > missing-sender-mx and reject-unresolvable-rdns > > > 3- into /etc/spamdyke/blacklist_recipients add your domain in format > > > @your-domain (it will block all mails like to: n...@your-domain from: > > > n...@your-domain) > > > 4- into /etc/spamdyke/ip-in-rdns-keyword-blacklist-file put these > > words : > > > > > > dsl > > > .com > > > .net > > > broadband > > > dynamic > > > > > > I could guarantee you will fall bellow 1% of SPAM with nearly zero > > > false positives. Of course someone who can't follow certain > > > guidelines for theirs servers will not be able to send you e-mails > > > at all. But you can easily handle it by adding IP's in > > > /etc/spamdyke/whitelist_ip or adding senders into > > > /etc/spamdyke/whitelist_senders > > > > > > I stop using any RBLS services ages ago, they are way unreliable. > > > > > > Good luck, > > > Eduard Švarc > > > > > > DATA Intertech s.r.o. > > > Kladenská 46 > > > 160 00 Praha 6 > > > Czech Republic > > > tel. +420-235365267, fax +420-235361446 > > > > > > spamdyke-users-boun...@spamdyke.org wrote on 14.12.2009 07:24:03: > > > > > > New Windows 7: Find the right PC for you. Learn more. > > > _______________________________________________ > > > spamdyke-users mailing list > > > spamdyke-users@spamdyke.org > > > http://www.spamdyke.org/mailman/listinfo/spamdyke-users > > ------------------------------------------------------------------------ > > > > _______________________________________________ > > spamdyke-users mailing list > > spamdyke-users@spamdyke.org > > http://www.spamdyke.org/mailman/listinfo/spamdyke-users > > >
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