Re: Why is "Sender address rejected" ?
On Fri, Jan 2, 2015, at 12:09 AM, Tobia Conforto wrote: > > I can't understand why. It says "Domain not found", but all the domains > > seem to be OK. > > > > host bounce.email.ivyexec.com > > bounce.email.ivyexec.com mail is handled by 10 > > bounce-mx.exacttarget.com. > > The sender domain has a MX record, but no address (A record) and you > probably have reject_unknown_sender_domain = yes, hence "Domain not > found". > > reject_unknown_sender_domain can cause some false positives, for > senders with misconfigured DNS, but it also cuts down on the spam. You > can contact the sender's admin to have his DNS fixed, turn the flag > off, or insert a specific rule to accept that sender before the > reject. > > Tobia Okay got it. I'm gonna keep the reject_unknown_sender_domain = yes for its benefits and contact the domain admin. Thanks a lot! Roger
Re: Why is "Sender address rejected" ?
On Wed, Dec 31, 2014 at 4:07 PM, wrote: > I can't understand why. It says "Domain not found", but all the domains seem > to be OK. > > host bounce.email.ivyexec.com > bounce.email.ivyexec.com mail is handled by 10 > bounce-mx.exacttarget.com. The sender domain has a MX record, but no address (A record) and you probably have reject_unknown_sender_domain = yes, hence "Domain not found". reject_unknown_sender_domain can cause some false positives, for senders with misconfigured DNS, but it also cuts down on the spam. You can contact the sender's admin to have his DNS fixed, turn the flag off, or insert a specific rule to accept that sender before the reject. Tobia
Re: Why is "Sender address rejected" ?
Am 31.12.2014 um 16:38 schrieb rogt3...@proinbox.com: On Wed, Dec 31, 2014, at 07:35 AM, Wietse Venema wrote: rogt3...@proinbox.com: Try turning off chroot operation in master.cf I guess I don't understand what chroot has to do with this one domain when everything else is working fine. What you see can happen when chrooted Postfix uses a DIFFERENT resolv.conf file that points to a different DNS resolver. That's why I suggest turning off chroot as a quick check. Wietse Okay that makes sense. But I don't have chroot ON. So I think everything should be using the same resolv.conf and only the one DNS server I have in there what about read other repsonses too? you are reporting a non-problem
Re: Why is "Sender address rejected" ?
On Wed, Dec 31, 2014, at 07:35 AM, Wietse Venema wrote: > rogt3...@proinbox.com: > > > Try turning off chroot operation in master.cf > > > > I guess I don't understand what chroot has to do with this one > > domain when everything else is working fine. > > What you see can happen when chrooted Postfix uses a DIFFERENT > resolv.conf file that points to a different DNS resolver. > > That's why I suggest turning off chroot as a quick check. > > Wietse Okay that makes sense. But I don't have chroot ON. So I think everything should be using the same resolv.conf and only the one DNS server I have in there. Roger
Re: Why is "Sender address rejected" ?
rogt3...@proinbox.com: > > Try turning off chroot operation in master.cf > > I guess I don't understand what chroot has to do with this one > domain when everything else is working fine. What you see can happen when chrooted Postfix uses a DIFFERENT resolv.conf file that points to a different DNS resolver. That's why I suggest turning off chroot as a quick check. Wietse
Re: Why is "Sender address rejected" ?
Am 31.12.2014 um 16:28 schrieb rogt3...@proinbox.com: On Wed, Dec 31, 2014, at 07:15 AM, Wietse Venema wrote: rogt3...@proinbox.com: This email is getting rejected. Dec 31 05:26:04 mailserver postfix/smtpd[776]: NOQUEUE: reject: RCPT from unknown[68.232.198.34]: 450 4.1.8 : Sender address rejected: Domain not found; from= to= proto=ESMTP helo= http://www.postfix.org/DEBUG_README.html#no_chroot Try turning off chroot operation in master.cf I guess I don't understand what chroot has to do with this one domain when everything else is working fine. you didn't make clear if you are at building up a new server or if it only affects a single domain - chroot is a often made mistake and a wrong default in some distributions like Debian so since chroot is out of question why in the world do you bother about a *temporary 450 reject* at all? * it is temporary * a sane delivering server tries again * if not it was a zombie - be happy * you are not responsible for a foreign DNS * even if it is a 5xx code it would not be *your* problem I have Postfix master process configuration file. For details on the format # of the file, see the Postfix master(5) manual page. # # == # service type private unpriv chroot wakeup maxproc command + args # (yes) (yes) (yes) (never) (100) # == smtp inet n - n - - smtpd None of the chroot columns in master.cf have a "y", they all have a "n"
Re: Why is "Sender address rejected" ?
On Wed, Dec 31, 2014, at 07:15 AM, Wietse Venema wrote: > rogt3...@proinbox.com: > > Hi > > > > This email is getting rejected. > > > > Dec 31 05:26:04 mailserver postfix/smtpd[776]: NOQUEUE: reject: RCPT from > > unknown[68.232.198.34]: 450 4.1.8 > > : > > Sender address rejected: Domain not found; > > from= > > to= proto=ESMTP helo= > > > > http://www.postfix.org/DEBUG_README.html#no_chroot > > Try turning off chroot operation in master.cf > I guess I don't understand what chroot has to do with this one domain when everything else is working fine. I have Postfix master process configuration file. For details on the format # of the file, see the Postfix master(5) manual page. # # == # service type private unpriv chroot wakeup maxproc command + args # (yes) (yes) (yes) (never) (100) # == smtp inet n - n - - smtpd None of the chroot columns in master.cf have a "y", they all have a "n". Roger
Re: Why is "Sender address rejected" ?
Am 31.12.2014 um 16:07 schrieb rogt3...@proinbox.com: This email is getting rejected. Dec 31 05:26:04 mailserver postfix/smtpd[776]: NOQUEUE: reject: RCPT from unknown[68.232.198.34]: 450 4.1.8 : Sender address rejected: Domain not found; from= to= proto=ESMTP helo= I can't understand why. It says "Domain not found", but all the domains seem to be OK 450 is a *temorary error* the DNS did not respond in the moment incoming mail arrived http://email.about.com/cs/standards/a/smtp_error_code.htm
Re: Why is "Sender address rejected" ?
rogt3...@proinbox.com: > Hi > > This email is getting rejected. > > Dec 31 05:26:04 mailserver postfix/smtpd[776]: NOQUEUE: reject: RCPT from > unknown[68.232.198.34]: 450 4.1.8 > : > Sender address rejected: Domain not found; > from= > to= proto=ESMTP helo= > http://www.postfix.org/DEBUG_README.html#no_chroot Try turning off chroot operation in master.cf A common mistake is to turn on chroot operation in the master.cf file without going through all the necessary steps to set up a chroot environment. This causes Postfix daemon processes to fail due to all kinds of missing files. The example below shows an SMTP server that is configured with chroot turned off: /etc/postfix/master.cf: # = # service type private unpriv chroot wakeup maxproc command # (yes) (yes) (yes) (never) (100) # = smtp inet n - n - - smtpd Inspect master.cf for any processes that have chroot operation not turned off. If you find any, save a copy of the master.cf file, and edit the entries in question. After executing the command "postfix reload", see if the problem has gone away. If turning off chrooted operation made the problem go away, then congratulations. Leaving Postfix running in this way is adequate for most sites. Wietse
Why is "Sender address rejected" ?
Hi This email is getting rejected. Dec 31 05:26:04 mailserver postfix/smtpd[776]: NOQUEUE: reject: RCPT from unknown[68.232.198.34]: 450 4.1.8 : Sender address rejected: Domain not found; from= to= proto=ESMTP helo= I can't understand why. It says "Domain not found", but all the domains seem to be OK. whois 68.232.198.34 NetRange: 68.232.192.0 - 68.232.207.255 CIDR: 68.232.192.0/20 NetName:EXACT-IP-NET-2 NetHandle: NET-68-232-192-0-1 Parent: NET68 (NET-68-0-0-0-0) NetType:Direct Assignment OriginAS: Organization: ExactTarget, Inc. (EXACT-7) RegDate:2009-07-08 Updated:2012-03-02 Ref: http://whois.arin.net/rest/net/NET-68-232-192-0-1 host 68.232.198.34 34.198.232.68.in-addr.arpa domain name pointer mta.email.ivyexec.com. host mta.email.ivyexec.com mta.email.ivyexec.com has address 68.232.198.34 host bounce.email.ivyexec.com bounce.email.ivyexec.com mail is handled by 10 bounce-mx.exacttarget.com. Can someone please explain what I'm missing, and what to do to NOT reject this legit email? THanks! Roger
