Gmail-teopro a écrit : > Hello guys, > > I have made a simple filter, following the example > here http://www.postfix.org/FILTER_README.html in order to insert a > number in the subject line of every message been sent. > The script of this filter is very similar with the example, in uses sed > to replace "Subject: " with "Subject: #$number" and autoincrements > $number every time it is triggered. > > The filter is defined in master.cf: > # ========================================================================== > # service type private unpriv chroot wakeup maxproc command + args > # (yes) (yes) (yes) (never) (100) > # ========================================================================== > smtp inet n - n - - smtpd > # -o receive_override_options=no_address_mappings > 10025 inet n - n - - smtpd > # -o receive_override_options=no_address_mappings > # > ............. > nrfilter unix - n n - 10 pipe > flags=Rq user=filter null_sender= > argv=/var/spool/filter/countscript -f ${sender} -- ${recipient} > dovecot unix - n n - - pipe > flags=DRhu user=vmail:vmail argv=/usr/libexec/dovecot/deliver -d > $(recipient) > > And is triggered from main.cf: > ...... > sender_bcc_maps = hash:/etc/postfix/maps/sender_bcc > smtpd_recipient_restrictions = > check_sender_access hash:/etc/postfix/maps/sender_nrfilter, >>>(mydomain.tld FILTER nrfilter:) > permit_mynetworks, > permit_sasl_authenticated, > reject_unlisted_recipient, > reject_unauth_destination, > reject_unknown_recipient_domain, > reject_rbl_client sbl-xbl.spamhaus.org, > reject_rbl_client cbl.abuseat.org, > reject_rbl_client bl.spamcop.net, > reject_rbl_client zen.spamhaus.org > > Every "filtered" message have to be bcc-ed into a local accout. > This Postfix serves one single virtual domain with virtual users defined > in mysql database. > > Now I am asking your advice because: > > 1. With the above configuration, the filter works ok but in the bcc > account I get 2 messages for each sent message(backscatter I guess). > 2. If I enable -o statement for the smtp services, I get only one > message in the bcc but the virtual aliasses are no more recognized by > Postfix > > So, it will be great if you can give a suggetion on how can I have only > 1 message in bcc account keeping active the virtual aliasses. > > 3. This problem is caused by faken...@mydomain.tld > <mailto:faken...@mydomain.tld>, claimig to be a mydomain.tld user, wich > triggers the filter but are finnaly rejected by cbl/rbl checks. > > NOQUEUE: filter: RCPT from > host216-58-dynamic.1-79-r.retail.telecomitalia.it[79.1.58.216]: > <afiaac...@mydomain.tld>: Sender address > triggers FILTER nrfilter:; from=<afiaac...@mydomain.tld> > to=<ag...@mydomain.tld> proto=ESMTP helo=<uomo754a9bd9e5> > NOQUEUE: reject: RCPT from > host216-58-dynamic.1-79-r.retail.telecomitalia.it[79.1.58.216]: 450 > 4.7.1 Service unavailable; Client host [79.1.58.216] blocked using > sbl-xbl.spamhaus.org; http://www.spamhaus.org/query/bl?ip=79.1.58.216; > from=<akinyiandar...@mydomain.tld> to=<ag...@mydomain.tld> proto=ESMTP > helo=<uomo754a9bd9e5> > > If I move check_sender_access statement after cbl/rbl checks, the filter > is no more triggered by anyone. > > Hoping I was clear enough, I am awaiting for your kind > suggestions/questions. >
unfortunately, it's not clear. - check_rbl_* is checked before the content_fileter, wherever you put you FILTER statement. - in general, you use -o ... to disable address rewrite before the filter. this way, alias, bcc, ... are only interpreted after your filter. if things work differently, then you have something else and you'll need to provide more information (config and logs).
