Testing POP3 and SMTP Server Mail Server Using Telnet

Last modified: October 5, 2022

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You may perform the following test to confirm the SMTP server is online and responding:

1. Start > Run > cmd (WinNT/XP/2003) orStart > Run > command (Win95/98)

2. Type command:telnet mail.domainname.com 25 (Example as below)

You should receive some response as below:

The message confirmed that the SMTP server is working properly.

3. To quit the Telnet prompt, type “quit”.

To confirm the POP server is online and responding:

1.Start > Run > cmd (WinNT/XP/2003) orStart > Run > command (Win95/98)

2.telnet mail.domainname.com 110 (Example as below)

You should receive some response as below:

The message confirmed that the POP server is working properly.

3. To quit the Telnet prompt, type “quit”

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