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Thread: Postfix can receive emails, but not send them.

  1. #1
    Join Date
    Feb 2013
    Beans
    29

    Postfix can receive emails, but not send them.

    Hi,

    I recently used this guide: https://help.ubuntu.com/community/Postfix
    to set up a postfix mail server. I've got it to receive emails at my domain from gmail, but I can't send them from my domain to gmail.

    Does anyone have any ideas what could be causing this issue?

    Here are some things in the mail queue:
    Code:
    B02802A024E      446 Tue Mar  5 16:09:50  me@mydomain.com
    (connect to alt2.gmail-smtp-in.l.google.com[74.125.131.26]:25: Connection timed out)
                                             me@gmail.com
    
    
    999D42A03AF      373 Tue Mar  5 16:56:07  me@mydomain.com
        (connect to mta5.am0.yahoodns.net[66.196.118.34]:25: Connection timed out)
                                             me@yahoo.com

  2. #2
    Join Date
    Nov 2008
    Location
    Metro Boston
    Beans
    8,819
    Distro
    Kubuntu 14.04 Trusty Tahr

    Re: Postfix can receive emails, but not send them.

    Is this a server on a residential connection? If so, the most likely explanation is that your ISP is blocking outbound SMTP connections in an effort to control spambots. Ask your ISP. If that's not the reason, we'll move on to other possibilities.

    It's also possible that your Terms of Service forbid running servers which is a pretty common policy in most residential Internet contracts. Read your ToS before calling the ISP.
    Last edited by SeijiSensei; March 6th, 2013 at 01:30 AM.
    If you ask for help, please have the courtesy to check for responses and thank the people who helped you.

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  3. #3
    Join Date
    Feb 2013
    Beans
    29

    Re: Postfix can receive emails, but not send them.

    Damn, it is blocked outbound. Gorram spammers.

  4. #4
    Join Date
    Dec 2012
    Location
    Canada
    Beans
    187
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Postfix can receive emails, but not send them.

    You may not be completely stymied. Many residential ISPs will block outbound connections on port 25 to any SMTP server other than their own. So, you might still be able to use your mail server once you've told it to route all outbound mail through your ISP's SMTP server (Postfix apparently calls this a "remotehost", other folks call it a "smarthost").

  5. #5
    Join Date
    Feb 2013
    Beans
    29

    Re: Postfix can receive emails, but not send them.

    That did it. Thanks, man.

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