The proper ESMTP style for this would be
(1) an EHLO keyword to say the server supports the feature
(2) a MAIL parameter for the client to enable the feature
Do you need more signalling than that? I think adding syntax to the message
body reply would be a bad idea, since that is usually used to feed back trace
info (queue ID). Perhaps you could have a new command to be used (pipelined)
after the body to retrieve the IMAP status. Would that make the MAIL parameter
redundant?
Tony.
--
f.anthony.n.finch <dot(_at_)dotat(_dot_)at> http://dotat.at/
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