Announcement

Collapse
No announcement yet.

Telnet Exchange Port 25

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Telnet Exchange Port 25

    I am not able to telnet to my Exchange 2003 mail server via
    "telnet mailservername 25" but I am able to send & receive mail via this
    server. Is this normal?

  • #2
    Re: Telnet Exchange Port 25

    Maybe a firewall is blocking Telnet but not SMTP?

    Tom
    Tom Jones
    MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
    PhD, MSc, FIAP, MIITT
    IT Trainer / Consultant
    Ossian Ltd
    Scotland

    ** Remember to give credit where credit is due and leave reputation points where appropriate **

    Comment


    • #3
      Re: Telnet Exchange Port 25

      Can you telnet from the server itself??

      Comment


      • #4
        Re: Telnet Exchange Port 25

        Yes you are right. Telnet is blocked but not smtp. I was under impression that to troubleshoot Exchange server, one should telnet to port 25. But who says that the telnet port is open?!

        Comment


        • #5
          Re: Telnet Exchange Port 25

          Telneting to port 25 on the Exchange server is a usual troubleshooting technique. Can you ping the server on the same name that you are entering in the telnet session?

          If you can, then something could be blocking the traffic. Some Antivirus applications (McAfee and certain versions of Symantec) block port 25 traffic as a virus prevention measure. Applications it recognises can use port 25, but not manual telnet sessions.

          Check your AV software to see if that is the case. If you are using McAfee 8.0i Enterprise then it will be the case.

          Simon.
          --
          Simon Butler
          Exchange MVP

          Blog: http://blog.sembee.co.uk/
          More Exchange Content: http://exchange.sembee.info/
          Exchange Resources List: http://exbpa.com/
          In the UK? Hire me: http://www.sembee.co.uk/

          Sembee is a registered trademark, used here with permission.

          Comment


          • #6
            Re: Telnet Exchange Port 25

            You don't happen to have McAfee installed do you??

            Comment

            Working...
            X