Home › Forums › OS X Server and Client Discussion › Questions and Answers › Can I get my OS X Mail Server to listen on two ports for SMTP traffic.

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  • February 24, 2007 at 4:47 pm #368384
    scott_m_sieifert
    Participant

    Question:

    Can I get my OS X Mail Server to listen on two ports for SMTP traffic. say 25 as the default but say another for others where the port 25 port is blocked by the ISP (i.e. ATT)

    Hope this is not a dumb question.

    Scott

    February 24, 2007 at 11:31 pm #368386
    bschappel
    Participant

    To add another listener you need to edit this file:

    /etc/postfix/master.cf

    Find this line (the real line has tabs separating the fields so it will look different):

    smtp inet n – n – – smtpd

    add another below it:

    587 inet n – n – – smtpd

    Save the file and stop and restart the mail server. Server Admin will do this nicely. Your mail clients can now be configured to use port 587 to send mail.

    Why port 587? It’s the standard alternate SMTP port. You can use any port that you wish as long as another service on the same box is not using that port.

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