Olá, estou tentando configurar o sendmail em um servidor Centos 7 para retransmitir e-mails de um programa local para nosso servidor de e-mail principal. Eu configurei sendmail.mc com o seguinte, mail.[domain].com é nosso servidor SMTP:
define('SMART_HOST', 'mail.[domínio].com')dnl
E
FEATURE(
nullclient',mail.[domínio].com') dnl
Este é o log do sendmail ao tentar enviar este e-mail:
Aug 24 11:52:18 centos7 sendmail[21975]: w7O8qIUJ021975: Authentication-Warning: centos7.[domain]: openproject set sender to info@[domain].com using -f
Aug 24 11:52:18 centos7 sendmail[21975]: w7O8qIUJ021975: from=info@[domain].com, size=2587, class=-60, nrcpts=1, msgid=<5b7fc7423c037_218b2acdfb6fcf7c2088c@centos7.[domain].mail>, relay=openproject@localhost
Aug 24 11:52:18 centos7 sendmail[21976]: w7O8qIMw021976: from=<info@[domain].com>, size=2854, class=-60, nrcpts=1, msgid=<5b7fc7423c037_218b2acdfb6fcf7c2088c@centos7.[domain].mail>, proto=ESMTP, daemon=MTA, relay=localhost [127.0.0.1]
Aug 24 11:52:18 centos7 sendmail[21975]: w7O8qIUJ021975: to=dennis@[domain].com, ctladdr=info@[domain].com (988/982), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=140587, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (w7O8qIMw021976 Message accepted for delivery)
Aug 24 11:52:18 centos7 sendmail[21978]: STARTTLS=client, relay=mail.[domain].com., version=TLSv1/SSLv3, verify=FAIL, cipher=ECDHE-RSA-AES256-SHA384, bits=256/256
Aug 24 11:52:18 centos7 sendmail[21978]: w7O8qIMw021976: to=<dennis@[domain].com>, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=230854, relay=mail.[domain].com. [192.168.111.10], dsn=5.1.1, stat=User unknown
Aug 24 11:52:18 centos7 sendmail[21978]: w7O8qIMw021976: w7O8qIMw021978: DSN: User unknown
Aug 24 11:52:18 centos7 sendmail[21978]: w7O8qIMw021978: to=<info@[domain].com>, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30000, relay=mail.[domain].com. [192.168.111.10], dsn=5.1.1, stat=User unknown
Aug 24 11:52:18 centos7 sendmail[21978]: w7O8qIMw021978: w7O8qIMx021978: return to sender: User unknown
Aug 24 11:52:18 centos7 sendmail[21978]: w7O8qIMx021978: to=postmaster, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30000, relay=mail.[domain].com. [192.168.111.10], dsn=5.1.1, stat=User unknown
Aug 24 11:52:18 centos7 sendmail[21978]: w7O8qIMw021978: Losing ./qfw7O8qIMw021978: savemail panic
Aug 24 11:52:18 centos7 sendmail[21978]: w7O8qIMw021978: SYSERR(root): savemail: cannot save rejected email anywhere
Agora, com base no que o log do sendmail diz, parece que meu e-mail dennis@[domínio].com não existe, o que é estranho porque existe. Mas se eu olhar o log no servidor de e-mail, verá algo um pouco diferente:
Fri 2018-08-24 11:52:18.667: Session 471387; child 0001
Fri 2018-08-24 11:52:18.667: Accepting SMTP connection from 192.168.111.15:42300 to 192.168.111.10:25
Fri 2018-08-24 11:52:18.670: --> 220 xxxx ESMTP MDaemon 18.0.2; Fri, 24 Aug 2018 11:52:18 +0300
Fri 2018-08-24 11:52:18.672: <-- EHLO centos7.[domain]
Fri 2018-08-24 11:52:18.673: --> 250-xxxxx Hello centos7.[domain] [192.168.111.15], pleased to meet you
Fri 2018-08-24 11:52:18.673: --> 250-ETRN
Fri 2018-08-24 11:52:18.673: --> 250-AUTH LOGIN CRAM-MD5 PLAIN
Fri 2018-08-24 11:52:18.673: --> 250-8BITMIME
Fri 2018-08-24 11:52:18.674: --> 250-ENHANCEDSTATUSCODES
Fri 2018-08-24 11:52:18.674: --> 250-STARTTLS
Fri 2018-08-24 11:52:18.674: --> 250 SIZE
Fri 2018-08-24 11:52:18.683: <-- STARTTLS
Fri 2018-08-24 11:52:18.683: --> 220 2.7.0 Ready to start TLS
Fri 2018-08-24 11:52:18.705: SSL negotiation successful (TLS 1.2, 256 bit key exchange, 256 bit AES encryption)
Fri 2018-08-24 11:52:18.716: <-- EHLO centos7.[domain]
Fri 2018-08-24 11:52:18.716: --> 250-xxxxx Hello centos7.[domain] [192.168.111.15], pleased to meet you
Fri 2018-08-24 11:52:18.716: --> 250-ETRN
Fri 2018-08-24 11:52:18.716: --> 250-AUTH LOGIN CRAM-MD5 PLAIN
Fri 2018-08-24 11:52:18.716: --> 250-8BITMIME
Fri 2018-08-24 11:52:18.716: --> 250-ENHANCEDSTATUSCODES
Fri 2018-08-24 11:52:18.716: --> 250 SIZE
Fri 2018-08-24 11:52:18.724: <-- MAIL From:<info@mail.[domain].com> SIZE=3046
Fri 2018-08-24 11:52:18.726: --> 250 2.1.0 Sender OK
Fri 2018-08-24 11:52:18.754: <-- RCPT To:<dennis@mail.[domain].com>
Fri 2018-08-24 11:52:18.755: Sender attempted to deliver message to unknown address
Então, por algum motivo, a parte do domínio no endereço de e-mail de e para foi corrompida. O servidor de e-mail pensa que alguém está tentando enviar para dennis@mail.[domínio].com quando na realidade quero enviar para dennis@[domínio].com.
Não tenho ideia de por que isso acontece.
Responder1
Hmm, quase constrangedor, mas continuei examinando o arquivo sendmail.mc e encontrei o seguinte bit que havia ativado anteriormente, recomendei a linha LOCAL_DOMAIN e tudo começou a funcionar.
dnl # Also accept email sent to "localhost.localdomain" as local email.
dnl #
LOCAL_DOMAIN(`[domain].com')dnl