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Re: Postfix sending mail to a different mail server on LAN

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  • mouss
    ... you said .6 is the NAT router. your internal systems shouldn t connect to this. they should connect to the internal IP of the server. The simplest way is
    Message 1 of 2 , Feb 28, 2006
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      Ki Song a écrit :
      > Dear Postfix Users,
      >
      > mail.knifecenter.com = my linux postfix mail server. this is my main mail
      > server. it is located "in house" on it's own ip address: 70.88.225.1
      >
      > store.knifecenter.com - my listserv server. it is also located "in house"
      > and is located behind a firewall router. the ip address is: 70.88.225.6
      >
      > omega.knifecenter.com = my backup mail server. this server is located at a
      > different location outside of my internal network.
      >
      > mac.knifecenter.com = outdated mail server. i should remove this record.
      >
      > A note that I should've mentioned before: I have 5 static ip addresses
      > dedicated to me from Comcast: 70.88.225.1-70.88.225.5. 70.88.225.6 is the
      > address of the router that I currently have (an SMC broadband router).
      > 70.88.225.6 uses NAT routing to direct SMTP traffic to my listserv server,
      > in house.
      >
      > It looks like when mail from inside my network is sent, either automatically
      > by Listserv or manually, when I just use Outlook, the mail.knifecenter.com
      > postfix server blocks this traffic.
      >
      > Here is the error message that happens with a message is sent from within my
      > network:
      >
      > Feb 28 15:12:53 mail postfix/smtpd[13937]: connect from unknown[10.1.10.19]
      > Feb 28 15:12:53 mail postfix/smtpd[13937]: 2972D357830:
      > client=unknown[10.1.10.19]
      > Feb 28 15:12:53 mail postfix/cleanup[13910]: 2972D357830:
      > message-id=<C02A18F2.162C7%ki@...>
      > Feb 28 15:12:53 mail postfix/qmgr[2578]: 2972D357830:
      > from=<ki@...>, size=541, nrcpt=1 (queue active)
      > Feb 28 15:12:53 mail postfix/qmgr[2578]: 2972D357830:
      > to=<listserv@...>, relay=none, delay=0,
      > status=deferred (delivery temporarily suspended: connect to
      > STORE.KNIFECENTER.COM[70.88.225.6]: Connection refused)
      > Feb 28 15:12:53 mail postfix/smtpd[13937]: disconnect from
      > unknown[10.1.10.19]
      >

      you said .6 is the NAT router. your internal systems shouldn't connect
      to this. they should connect to the internal IP of the server. The
      simplest way is to add another name (smtp.$yourdomain) and use this in
      your MUAs and internal MTAs. or you can play with DNS views if you have
      mobile clients.
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