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  1. #1
    Join Date
    Apr 2003

    Could I deliver one server email through another server?

    Hello, I am having trouble delivering email to hotmail from one server that was reported as spam source yesterday.

    We have removed the offending account and placed a request to msn support to remove any block on our IP address but still have not answer to our request since almost 24 hours. Still keep receiving the same answer:

    550 SC-001 Mail rejected by Windows Live Hotmail for policy reasons. Reasons for rejection may be related to content with spam-like characteristics or IP/domain reputation problems. If you are not an email/network admin please contact your E-mail/Internet Service Provider for help. Email/network admins, please visit for email delivery information and support
    Is it possible to route my server email though another machine at least while the ip address is kept blocked? I mean may I use any firewall rule to move all port 25 trafic to a clean server to avoid the delivery problems?

    I have 100 customers who can't communicate with its partners due this problem.

  2. #2
    Join Date
    Mar 2003
    Did you try to setup a new ip in the server and use it instead? I mean a different class of ip?
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  3. #3
    Join Date
    Jun 2008
    yes it's definately possible to do with another server, but the setup i'm not sure about, you'd have to see if a management company or someone can arrange that for you.
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  4. #4
    Join Date
    Jun 2003
    World Wide Web
    You must be able to change the interface ip for you mail server on the conf file. You don't need to route the mails through another server, when it is possible to change the interface ip. - the name says it all!
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  5. #5
    Join Date
    Oct 2004
    Kerala, India
    What mail server are you using? Does your server have any control panel? By default the server main IP is used as the mail server IP. In these kind of situations if you have dedicated IP free on the server we can redirect the mails though that IP. Or you will need to set a different MX for all domains that will point to a different server.
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  6. #6
    Join Date
    Aug 2001
    Orange County, CA
    In Postfix you can use transport maps which make this very easy:
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  7. #7
    Join Date
    Apr 2003
    Thanks for the info, actually I use whm/cpanel

    So what should I do to change exim configuration to use one of my available IP addresses?
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  8. #8
    Join Date
    Dec 2005
    Virginia, USA
    Find this in exim.conf

    # This transport is used for delivering messages over SMTP connections.
      driver = smtp
    Right under driver = smtp put:

    interface = x.x.x.x
    where the x.x.x.x is the ip you want exim to use. Then restart exim.

  9. #9
    Join Date
    May 2009
    Changing the interface IP is a good shot. The other option to point your account's MX to a different server will be subjected to a propagation delay (change in MX) and is a tedious process.

    After changing the interface IP check if the below criteria is met:

    1) telnet your_server's_IP 25

    Check if the FQDN which responds with 220 response code, has proper DNS and rDNS records.

    But I will strongly recommend you to contact the email providers (hotmail,gmail) to get more info on the mail block. If the root cause of the issue is not dealt, then your new interface IP will get blacklisted in any of the spam DBs and eventually large email providers like hotmail will block your IP.

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