You can manually interact with a POP server to perhaps manually delete
an email that your mail too is having trouble downloading, or simply
to check things out. Here's a sample manual session:
$ telnet pop.togaware.com 110
Connected to pop.togaware.com.
Escape character is '^]'.
+OK Hello there.
+OK Password required.
+OK logged in.
+OK POP3 clients that break here, they violate STD53.
+OK 2269 octets follow.
Connection closed by foreign host.
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