Hello, I am having a weird problem of "loops back to myself" mail.
I have setup 2 postfix instances "work" and "dummy". The "work" instance listen on IP 1.1.2.1 port 25 and deliver mail to Internet and transport to another server for inside domains. This is working fine. The "dummy" instance is a new instance, listen on IP 1.1.2.1 port 12025 and its function should be simply to deliver received mail to "work" instance on port 25. The "dummy" instance has myhostname changed and relayhost set to: relayhost = [1.1.2.1]:25 Problem is that "dummy" believes that destination is itself and "loops back to myself" is logged. It is wrong because destination is really "work" instance (port 25) not itself (port 12025). Is there any way to solve this? Or any way to turn off this check for this instance? Jun 17 16:26:57 mail:info postfix-dummy/smtpd: postfix-dummy/smtpd[2482]: connect from mx1.domain.com[1.1.2.1] Jun 17 16:26:58 mail:info postfix-dummy/smtpd: postfix-dummy/smtpd[2482]: 920B41E099: client=mx1.domain.com[1.1.2.1] Jun 17 16:26:58 mail:info postfix-dummy/cleanup: postfix-dummy/cleanup[2484]: 920B41E099: message-id=<20100617142658.920b41e...@dummy-andromeda.domain.com> Jun 17 16:26:58 mail:info postfix-dummy/qmgr: postfix-dummy/qmgr[2480]: 920B41E099: from=<f...@srcdomain.com>, size=374, nrcpt=1 (queue active) Jun 17 16:26:58 mail:warning postfix-dummy/smtp: postfix-dummy/smtp[2485]: warning: relayhost configuration problem Jun 17 16:26:58 mail:info postfix-dummy/smtp: postfix-dummy/smtp[2485]: 920B41E099: to=<destinat...@dstdomain.com>, relay=none, delay=0.1, delays=0.09/0.01/0/0, dsn=4.3.5, status=deferred (mail for 1.1.2.1 loops back to myself) As a workaround I can use, in "dummy" instance: relayhost = [1.1.2.1]:2500 And then in "work" instance add the port (service) 2500 in master.cf as smtp. This works as it seems that "loop check" is ignored if relayhost is not to port 25, but I don't like this solution very much. Any other way to turn this check off or so? Regards, Carlos Velasco *************** AVISO LEGAL *************** Este mensaje va dirigido, de manera exclusiva, a su destinatario y contiene información confidencial y sujeta al secreto profesional, cuya divulgación no está permitida por la ley. En caso de haber recibido este mensaje por error, le rogamos que, de forma inmediata, nos lo comunique mediante correo electrónico remitido a nuestra atención o a través del teléfono (+34 914531200) y proceda a su eliminación, así como a la de cualquier documento adjunto al mismo. Asimismo, le comunicamos que la distribución, copia o utilización de este mensaje, o de cualquier documento adjunto al mismo, cualquiera que fuera su finalidad, están prohibidas por la ley. Le informamos, como destinatario de este mensaje, que el correo electrónico y las comunicaciones por medio de Internet no permiten asegurar ni garantizar la confidencialidad de los mensajes transmitidos, así como tampoco su integridad o su correcta recepción, por lo que el CNIC no asume responsabilidad alguna por tales circunstancias. Si no consintiese la utilización del correo electrónico o de las comunicaciones vía Internet le rogamos nos lo comunique y ponga en nuestro conocimiento de manera inmediata. *************** LEGAL NOTICE ************** This message is intended exclusively for the person to whom it is addressed and contains privileged and confidential information protected from disclosure by law. If you are not the addressee indicated in this message, you should immediately delete it and any attachments and notify the sender by reply e-mail or by phone (+34 914531200). In such case, you are hereby notified that any dissemination, distribution, copying or use of this message or any attachments, for any purpose, is strictly prohibited by law. We hereby inform you, as addressee of this message, that e-mail and Internet do not guarantee the confidentiality, nor the completeness or proper reception of the messages sent and, thus, CNIC does not assume any liability for those circumstances. Should you not agree to the use of e-mail or to communications via Internet, you are kindly requested to notify us immediately.
