On 08/11/2012 23:21, Jeroen Geilman wrote: > Postfix cannot detect a mail loop if it has never seen the message before. > You are not re-injecting the filtered message, you are (or, rather, SA > is) calling sendmail(1), which in turn invokes pickup(8): > > Nov 8 12:35:47 zed postfix/pickup[2485]: BCDF560EF: uid=65534 > from=<instant.checkm...@designakeackson.info> > > This means a different path is followed from the original submission > over SMTP; sendmail-submitted mail generally lacks features that allow > such loops to be detected. > In this case, you are using the "nobody" user to re-submit the message, > which will throw postfix off further, since it has no MAIL FROM: to > match it with. > > Re-inject the message over a separate smtpd(8) instance instead; the > content filter loopback will not alter the envelope, thus enabling > postfix to detect a loop. > > smtpd(8): MAIL FROM: joe@home, RCPT TO: jim@work -> Spamassassin -> SMTP > re-inject: MAIL FROM: joe@home, RCPT TO: jim@work. > sendmail(1): MAIL FROM: joe@home, RCPT TO: jim@work -> Spamassassin -> > sendmail: MAIL FROM: nobody (uid=65534), RCPT TO: jim@work. > > Note the "nobody" above.
Hello Jeroen, thank you for your reply, but I do not follow you. My problem is that a mail forwarding loop is detected where I suppose there should be none, not the opposite. The same log you quite, imho shows that a proper FROM was indeed provided by sendmail, as I believe that Postfix reports the envelope sendere and not the From: header in its logs. My configuration is basically what described as "Simple content filter example" in the documentation: http://www.postfix.org/FILTER_README.html Cheers, Daniele
