telnet has a lot of weakness compare to
ssh. Most notably would be it transmits in plain text across the network, which everyone can look at it as long as one can tap into the line. Still, it is very much useful in trouble shooting application layer problems, e.g.
http, smtp, pop, ftp, irc & others.
This post attempt to demonstrate how to use
telnet to trouble shoot
pop3 protocol problems. Or even better, use
telnet to read email on
port 110.
Scenario 1 :
Often, when email client such as
thunderbird, apple mail, opera mail & others, fails for some reason and its error message indicate that error occurs during communication with the server. But calling the server hosting administrator and they claim that the server is working fine.
Scenario 2:
The machine that we used does not belongs to us. Setting up an email account on it would certainly post
security issue to our email account. But then, we just wanna find out what email messages have inside our mailbox. Probably, just wanna read a few lines of the mail message.
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