On Tue, 24 Nov 2009, Alexey Melnikov wrote:
Please let me know if you know of implementations (MTAs/MDAs) that generate
such parameters (in particular ESMTPA/ESMTPS/ESMTPSA/LMTPA/LMTPS/LMTPSA)
Exim, since version 4.42 released on 2004-08-27.
and clients that parse Received headers and analyze/check the
corresponding WITH parameter values.
SpamAssassin uses them to detect message submission hops.
Tony.
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