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From: Mills@UDEL.EDU.UUCP
Newsgroups: comp.protocols.tcp-ip
Subject: Re:  Are simultaneous TCP opens useful?
Message-ID: <8708272338.aa04715@Huey.UDEL.EDU>
Date: Thu, 27-Aug-87 23:38:02 EDT
Article-I.D.: Huey.8708272338.aa04715
Posted: Thu Aug 27 23:38:02 1987
Date-Received: Sat, 29-Aug-87 15:58:33 EDT
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Vint,

The vintage Internet Message Protocol (RFC-759) uses, at least in
some implementations, port 45 for both source and destination. The
result is that it is readily possible that simultaneous connection
attempts can result in a single synchronized connection. This was considered
a feature.

Dave