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-# POP3 - Post Office Protocol version 3 (popular e-mail protocol) - RFC 1939
-# Pattern attributes: great veryfast fast
-# Protocol groups: mail ietf_internet_standard
-# Wiki: http://www.protocolinfo.org/wiki/POP
-# Copyright (C) 2008 Matthew Strait, Ethan Sommer; See ../LICENSE
-#
-# This pattern has been tested somewhat.
-
-# this is a difficult protocol to match because of the relative lack of
-# distinguishing information. Read on.
-pop3
-
-# this the most conservative pattern. It should definitely work.
-#^(\+ok|-err)
-
-# this pattern assumes that the server says _something_ after +ok or -err
-# I think this is probably the way to go.
-^(\+ok |-err )
-
-# more that 90% of servers seem to say "pop" after "+ok", but not all.
-#^(\+ok .*pop)
-
-# Here's another tack. I think this is my second favorite.
-#^(\+ok [\x09-\x0d -~]*(ready|hello|pop|starting)|-err [\x09-\x0d -~]*(invalid|unknown|unimplemented|unrecognized|command))
-
-# this matches the server saying "you have N messages that are M bytes",
-# which the client probably asks for early in the session (not tested)
-#\+ok [0-9]+ [0-9]+
-
-# some sample servers:
-# RFC example: +OK POP3 server ready <1896.697170952@dbc.mtview.ca.us>
-# mail.dreamhost.com: +OK Hello there.
-# pop.carleton.edu: +OK POP3D(*) Server PMDFV6.2.2 at Fri, 12 Sep 2003 19:28:10 -0500 (CDT) (APOP disabled)
-# mail.earthlink.net: +OK NGPopper vEL_4_38 at earthlink.net ready <25509.1063412951@falcon>
-# *.email.umn.edu: +OK Cubic Circle's v1.22 1998/04/11 POP3 ready <7d1e0000da67623f@aquamarine.tc.umn.edu>
-# mail.yale.edu: +OK POP3 pantheon-po01 v2002.81 server ready
-# mail.gustavus.edu: +OK POP3 solen v2001.78 server ready
-# mail.reed.edu: +OK POP3 letra.reed.edu v2002.81 server ready
-# mail.bowdoin.edu: +OK mail.bowdoin.edu POP3 service (iPlanet Messaging Server 5.2 HotFix 1.15 (built Apr 28 2003))
-# pop.colby.edu: +OK Qpopper (version 4.0.5) at basalt starting.
-# mail.mac.com: +OK Netscape Messaging Multiplexor ready
-
-# various error strings:
-#-ERR Invalid command.
-#-ERR invalid command
-#-ERR unimplemented
-#-ERR Invalid command, try one of: USER name, PASS string, QUIT
-#-ERR Unknown AUTHORIZATION state command
-#-ERR Unrecognized command
-#-ERR Unknown command: "sadf'".