On Sun, 21 Aug 2005, Frank Ellermann wrote:
The "official" abbreviations are not very popular, see also
Exim uses them in its Received: lines. See for example the "esmtpa" in
this message header. This is useful for software like SpamAssassin which
likes to be able to work out which Received: lines correspond to message
submission and which to message relay.
f.a.n.finch <dot(_at_)dotat(_dot_)at> http://dotat.at/
BISCAY: WEST 5 OR 6 BECOMING VARIABLE 3 OR 4. SHOWERS AT FIRST. MODERATE OR