I am currently checking if the Sieve implementation conforms to
http://www.ietf.org/internet-drafts/draft-ietf-sieve-vacation-03.txt
and found the following:
Implementations SHOULD NOT respond to any message that contains a
"List-Id" [RFC2919], "List-Help", "List-Subscribe", "List-
Unsubscribe", "List-Post", "List-Owner" or "List-Archive" [RFC2369]
header field.
Exim checks for existance of "List-*" headers, so it actually does more.
Why?
In case there are more List headers than those above, it would make sense
to add them to the above list or even suggest to use "List-*" instead.
In case there are no more, I would prefer if Exim used exactly that list
(after 4.53 final :-).
Any comments on this are welcome.
Michael