SMTP Authentication

Discussion in 'Server Operation' started by wizard, Sep 6, 2008.

  1. wizard

    wizard New Member

    Attached Files:

    Last edited: Sep 6, 2008
  2. ralic

    ralic New Member

    In my experience you are seeing this error because something is blocking port 25. Could be a firewall, could be your ISP.

    Try and and have a friend on a different ISP telnet to 'your.server.name' port 25. If they can connect, and you can't then the problem is almost certainly your ISP you use at home. If they can't connect it's possibly a firewall blocking connections, or it could still be your ISP if you use the same one for home and work.

    If the problem is a firewall, you will need to disable it or have someone at the office allow you access.
    If the problem is your ISP, you will have to make postfix listen on a different port.
     
  3. wizard

    wizard New Member

    I use endian firewall (V2.2 RC2) to internet gateway ,mailserver in DMZ zone.
    I test firewall by telnet xx.xx.xx.xx 110 -> OK (from outside)
    telnet xx.xx.xx.xx 25 -> close connection
    I think firewall it block port 25 .Some one can help config endian to enable port 25.
     

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  4. falko

    falko Super Moderator ISPConfig Developer

    I'd first ask your ISP if they're blocking port 25.
     
  5. ralic

    ralic New Member

    Sorry, I can't help with endian. Suggest you follow Falko's advice and post back here once you have determined if they are blocking port 25 or not.
     

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