Check port 25

Discussion in 'Ethical hacking' started by NEtGeek, Feb 22, 2011.

  1. NEtGeek

    NEtGeek New Member

    Feb 22, 2011
    Likes Received:
    Trophy Points:
    In this post, I'm going to tell you two different ways to check if your ISP is blocking outbound smtp port 25 .

    The Easy way:

    1. From your browser go to
    2. Click "Start Test"

    The web app basically attempts to establish a connection from your computer to outbound port 25, and tells you if the connection was successfully established.

    The Windows way:

    1. Press "Start" type "cmd" and click on it.
    2. Type telnet 25
    3. If you get a response similar to "" then your ISP is not blocking outbound port 25

    This is similar to the previous method but uses the windows telnet client to check port 25 accessibility.

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice