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# SMTP - Simple Mail Transfer Protocol - RFC 2821 (See also RFC 1869)
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# Pattern attributes: great notsofast fast
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# Protocol groups: mail ietf_internet_standard
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# Wiki: http://www.protocolinfo.org/wiki/SMTP
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# Copyright (C) 2008 Matthew Strait, Ethan Sommer; See ../LICENSE
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#
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# usually runs on port 25
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#
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# This pattern has been tested and is believed to work well.
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# As usual, no text is required after "220", but all known servers have some
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# there. It (almost?) always has string "smtp" in it. The RFC examples
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# does not, so we match those too, just in case anyone has copied them
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# literally.
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#
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# Some examples:
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# 220 mail.stalker.com ESMTP CommuniGate Pro 4.1.3
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# 220 mail.vieodata.com ESMTP Merak 6.1.0; Mon, 15 Sep 2003 13:48:11 -0400
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# 220 mail.ut.caldera.com ESMTP
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# 220 persephone.pmail.gen.nz ESMTP server ready.
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# 220 smtp1.superb.net ESMTP
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# 220 mail.kerio.com Kerio MailServer 5.6.7 ESMTP ready
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# 220-mail.deerfield.com ESMTP VisNetic.MailServer.v6.0.9.0; Mon, 15 Sep 2003 13:4
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# 220 altn.com ESMTP MDaemon 6.8.5; Mon, 15 Sep 2003 12:46:42 -0500
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# 220 X1 NT-ESMTP Server ipsmin0165atl2.interland.net (IMail 6.06 73062-3)
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# 220 mail.icewarp.com ESMTP Merak 6.1.1; Mon, 15 Sep 2003 19:43:23 +0200
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# 220-mail.email-scan.com ESMTP
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# 220 smaug.dreamhost.com ESMTP
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# 220 kona.carleton.edu -- Server ESMTP (PMDF V6.2#30648)
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# 220 letra.reed.edu ESMTP Sendmail 8.12.9/8.12.9; Mon, 15 Sep 2003 10:35:57 -0700 (PDT)
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# 220-swan.mail.pas.earthlink.net ESMTP Exim 3.33 #1 Mon, 15 Sep 2003 10:32:15 -0700
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#
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# RFC examples:
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# 220 xyz.com Simple Mail Transfer Service Ready (RFC example)
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# 220 dbc.mtview.ca.us SMTP service ready
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smtp
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^220[\x09-\x0d -~]* (e?smtp|simple mail)
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userspace pattern=^220[\x09-\x0d -~]* (E?SMTP|[Ss]imple [Mm]ail)
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userspace flags=REG_NOSUB REG_EXTENDED
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