Send Message when reject_unknown_hostname is invoked
in [Postfix]
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From: jason hirsh on 13 Aug 2010 13:05 I am apparently having an issue with some servers whose mail is being rejected because of reject_unknown_hostname the reject was shown here Aug 11 00:21:36 xxxxxxx postfix/smtpd[96422]: NOQUEUE: reject: RCPT from mail01a.yesbank.com[65.196.66.182]: 450 4.7.1 <MTL01PPSMTP1.YESBANK.COM>: Helo command rejected: Host not found; from=<pbonamas(a)yesbank.com> to=<diane(a)witheld.com> proto=ESMTP helo=<MTL01PPSMTP1.YESBANK.COM> Aug 11 00:21:36 batfish postfix/smtpd[96422]: generic_checks: name=reject_unknown_hostname status=2 Aug 11 00:21:36 xxxx postfix/smtpd[96422]: > mail01a.yesbank.com[65.196.66.182]: 450 4.7.1 <MTL01PPSMTP1.YESBANK.COM>: Helo command rejected: Host not found Aug 11 00:21:36 xxxx postfix/smtpd[96422]: < mail01a.yesbank.com[65.196.66.182]: DATA Aug 11 00:21:36 xxxx postfix/smtpd[96422]: > mail01a.yesbank.com[65.196.66.182]: 554 5.5.1 Error: no valid recipients Aug 11 00:21:36 xxxx postfix/smtpd[96422]: < mail01a.yesbank.com[65.196.66.182]: RSET but no reject message went out... Is there a way I can esnure an error message goes out to the sender??? it would also be nice if could cc my postmaster account when rejects occur
From: Jeroen Geilman on 13 Aug 2010 13:22 On 08/13/2010 07:05 PM, jason hirsh wrote: > I am apparently having an issue with some servers whose mail is being > rejected because of > > reject_unknown_hostname > > the reject was shown here > > Aug 11 00:21:36 xxxxxxx batfish ? > postfix/smtpd[96422]: NOQUEUE: reject: RCPT from > mail01a.yesbank.com[65.196.66.182]: 450 4.7.1 > <MTL01PPSMTP1.YESBANK.COM>: Helo command rejected: Host not found; > from=<pbonamas(a)yesbank.com <mailto:pbonamas(a)yesbank.com>> > to=<diane(a)witheld.com <mailto:diane(a)witheld.com>> proto=ESMTP > helo=<MTL01PPSMTP1.YESBANK.COM> > Aug 11 00:21:36 batfish postfix/smtpd[96422]: generic_checks: > name=reject_unknown_hostname status=2 Debug logging. Don't. > Aug 11 00:21:36 xxxx postfix/smtpd[96422]: > > mail01a.yesbank.com[65.196.66.182]: 450 4.7.1 > <MTL01PPSMTP1.YESBANK.COM>: Helo command rejected: Host not found Duplicated, because of debug logging. Don't. > Aug 11 00:21:36 xxxx postfix/smtpd[96422]: < > mail01a.yesbank.com[65.196.66.182]: DATA Useless. > Aug 11 00:21:36 xxxx postfix/smtpd[96422]: > > mail01a.yesbank.com[65.196.66.182]: 554 5.5.1 Error: no valid recipients Odd. > Aug 11 00:21:36 xxxx postfix/smtpd[96422]: < > mail01a.yesbank.com[65.196.66.182]: RSET Uselesser. > > > > but no reject message went out... A whut ? > Is there a way I can esnure an error message goes out to the sender??? If postfix rejects a message ? That would be the job of the sending MTA. > > it would also be nice if could cc my postmaster account when rejects occur You really don't want to do that. J.
From: jason hirsh on 13 Aug 2010 13:35 On Aug 13, 2010, at 1:22 PM, Jeroen Geilman wrote: > On 08/13/2010 07:05 PM, jason hirsh wrote: >> >> I am apparently having an issue with some servers whose mail is >> being rejected because of >> >> reject_unknown_hostname >> >> >> the reject was shown here >> >> >> Aug 11 00:21:36 xxxxxxx > > batfish ? i was trying to remove my server name for email > >> postfix/smtpd[96422]: NOQUEUE: reject: RCPT from >> mail01a.yesbank.com[65.196.66.182]: 450 4.7.1 >> <MTL01PPSMTP1.YESBANK.COM>: Helo command rejected: Host not found; >> from=<pbonamas(a)yesbank.com> to=<diane(a)witheld.com> proto=ESMTP >> helo=<MTL01PPSMTP1.YESBANK.COM> >> >> Aug 11 00:21:36 batfish postfix/smtpd[96422]: generic_checks: >> name=reject_unknown_hostname status=2 >> > > Debug logging. Don't. I am debugging > >> Aug 11 00:21:36 xxxx postfix/smtpd[96422]: > >> mail01a.yesbank.com[65.196.66.182]: 450 4.7.1 >> <MTL01PPSMTP1.YESBANK.COM>: Helo command rejected: Host not found >> > > Duplicated, because of debug logging. Don't. > when I stop debugging I won't this is the third instance of I have had of "lost mail" and teh first that I had the address so I can chase it down >> Aug 11 00:21:36 xxxx postfix/smtpd[96422]: < >> mail01a.yesbank.com[65.196.66.182]: DATA >> > > Useless. > >> Aug 11 00:21:36 xxxx postfix/smtpd[96422]: > >> mail01a.yesbank.com[65.196.66.182]: 554 5.5.1 Error: no valid >> recipients >> > > Odd. > >> Aug 11 00:21:36 xxxx postfix/smtpd[96422]: < >> mail01a.yesbank.com[65.196.66.182]: RSET >> > > Uselesser. > >> >> >> >> >> >> >> but no reject message went out... > > A whut ? > >> Is there a way I can esnure an error message goes out to the >> sender??? > > If postfix rejects a message ? > That would be the job of the sending MTA. The sender said to my client that he sent the message .. he was unaware it was rejected I would like to reject it back to the sender so he knows.. > >> >> >> it would also be nice if could cc my postmaster account when >> rejects occur > > You really don't want to do that. if I can't notify senders of rejects it sure beats searching logs for rejects > > J. >
From: Larry Stone on 13 Aug 2010 14:14 On Fri, 13 Aug 2010, jason hirsh wrote: > when I stop debugging I won't this is the third instance of I have had of > "lost mail" and teh first that I had the address so I can chase it down You didn't lose any mail. The upstream server did. You can't fix other server's problems and until you accept the mail (you didn't), it's not yours to lose. > The sender said to my client that he sent the message .. he was unaware it > was rejected > I would like to reject it back to the sender so he knows.. You did reject it. Notification is the job of the last MTA to accept the message. A rejecting MTA cannot provide any notification back to the sender without it being at serious risk of being a backscatter source. That the upstream MTA failed to properly notify the sender is not, let me make that clear, IS NOT your problem to solve. If the sender is complaining to you, you need to tell him or her that your system rejected the message (which is your right) and that failure to notify him or her of the rejection is a failure by a server not under your control. He needs to complain to his provider as to why the upstream server (most likely the one he is sending via or if not, very near it) is not properly notifying him. > if I can't notify senders of rejects it sure beats searching logs for rejects Are you new to this? Because given the level of spam and other crud on the Internet, with any kind of anti-spam/anti-virus controls in place, you should be (or soon will be) rejecting hundreds if not thousands of messages per day. -- Larry Stone lstone19(a)stonejongleux.com
From: Wietse Venema on 13 Aug 2010 14:22 jason hirsh: > I am apparently having an issue with some servers whose mail is being > rejected because of > > reject_unknown_hostname > > the reject was shown here > > Aug 11 00:21:36 xxxxxxx postfix/smtpd[96422]: NOQUEUE: reject: RCPT > from mail01a.yesbank.com[65.196.66.182]: 450 4.7.1 > <MTL01PPSMTP1.YESBANK.COM>: Helo command rejected: Host not found; > from=<pbonamas(a)yesbank.com> to=<diane(a)witheld.com> proto=ESMTP .... > but no reject message went out... Is there a way I can esnure an > error message goes out to the sender??? No reject message is sent out because your server answers with SMTP reply code 450. This corresponds with a "Try Again" class error. The SENDING MTA will give up after trying for several days. Only then will the sending MTA inform sender that the message is undeliverable, The 450 reply code means that the hostname lookup failed because Postfix received no reply when it looked up the client hostname, or when it tried to verify that the name really resolves to the client IP address. Wietse
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