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How to use Telnet via Port 25..

Discussion in 'Networks' started by Boycie, Jan 25, 2006.

  1. Boycie
    Honorary Member

    Boycie Senior Beer Tester

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    I recently had a problem sending mail via my ISP. They offer Webmail for people on the move wishing to send via their normal SMTP server.
    The problem was, it was the SMTP playing up :( They asked if i could connect via Port 25 using Telnet. The default for Telnet is 23.... Any ideas on how to change to 25?


    Edit

    oh, i have tried Telnet O my mail server [25]
     
    Certifications: MCSA 2003, MCDST, A+, N+, CTT+, MCT
  2. Bluerinse
    Honorary Member

    Bluerinse Exabyte Poster

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    Boyce, you just tell telnet what port after the name of your email server as below...

    Open the cmd prompt.
    Type telnet server.com 25 (where "server.com" is the name of your email provider, such as aol.com).
    Type helo server.com.
    Type MAIL FROM you@server.com.
    Type RCPT TO Friend1@anotherserver.com, friend_two@someotherserver.org, friend.3three@Someserver.com, etc.
    To write the message, type DATA, followed by your message.
    To end the message, put a period on a line by itself and press Enter.

    http://wiki.ehow.com/Send-Email-Using-Telnet
     
    Certifications: C&G Electronics - MCSA (W2K) MCSE (W2K)
  3. hbroomhall

    hbroomhall Petabyte Poster Gold Member

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    Note that for *some* ISPs attempting to use a SMTP server that doesn't belong to them won't work. What these ISPs do is capture the open request and send it to their own server.

    What happens then can be rather variable, including a 'relay denied' message!

    Harry.
     
    Certifications: ECDL A+ Network+ i-Net+
    WIP: Server+
  4. MarkN

    MarkN Nibble Poster

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    A common method is to go to www.dnsstuff.com, in the top right hand box (dnslookup) put in the domain name to be tested and select the MX (mail exchanger) record. You will then be returned a list of IP addresses for MX records for the domain in question. Now go to the cmd prompt, and enter:

    telnet <ip address> 25 and this will attempt to establish a connection with the relevant server. If you don't add a port number telnet will default to 23.
     
    Certifications: MCSE NT4\W2K,CNE,CCEA,ASE
    WIP: CCNA
  5. Boycie
    Honorary Member

    Boycie Senior Beer Tester

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    Thanks for the input on this one guy's. I posted just before i had some time off :thumbleft
     
    Certifications: MCSA 2003, MCDST, A+, N+, CTT+, MCT
  6. hbroomhall

    hbroomhall Petabyte Poster Gold Member

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    I wondered why you had been so quiet lately!

    Hope it was a good holiday!

    Harry.
     
    Certifications: ECDL A+ Network+ i-Net+
    WIP: Server+
  7. Sandy

    Sandy Ex-Member

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    Lets hope that the port is not blocked for telnet access!
     

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