addtional transport

  • Robert Moskowitz


    I will want to use port 587 as a secondary port.  Am I suppose to follow the instructions for 'addtional transport'?  Are there standard setup here for adding port 587?

  • Simon Hobson

    Simon Hobson - 2012-12-19

    PFA doesn't need anything setting up for this - it's entirely a Postfix issue. Some distros (eg Debian) set this up automatically, if not then you'll need to add an entry to

    Checking one of my boxes, Debian installs these in :

    smtp      inet  n       -       -       -       -       smtpd
    submission inet n       -       -       -       -       smtpd
      -o smtpd_tls_security_level=encrypt
      -o smtpd_sasl_auth_enable=yes
      -o smtpd_client_restrictions=permit_sasl_authenticated,reject

    As I read the man page for, it looks like this is sufficient to start an SMTP server listening on the Submission port on all interfaces - the first field being of the form "port".
    The options available to smtpd are described in it's man page - and are mostly the same (IIRC) as those you can use in

  • Charles

    Charles - 2012-12-20


    Port 587, aka the 'submission' port, is NOT a 'transport', it is simply a TCP port used by postfix to allow mail CLIENTS to TLS authenticate to send emails.

    A transport in postfix is a completely different animal:


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