This is a request for a very minor change to the semantics of the
PREPEND <text> result that can be returned from policy servers
and/or from specific entries within an access(5) lookup table.
It would be maximally convenient if the subject <text> could be
interpolated in the following trivial way:
Any literal "\n" (backslash-n) sequence withing <text> is
replaced with an actual newline character.
This trivial change would allow prepending of multiple headers
to the current e-mail message.
This capability would be useful in the context of systems that
tag incoming messages for later analysis and/or special processing
by tools external to the mail server.
Alternatively, given that the Postfix policy server protocol
theoretically allows for the possibility of a policy server
yielding multiple "action=PREPEND <text>" results in response
to any given single request (from Postfix), it would be Nice if
Postfix would in fact accept a sequence of multiple such responses
from a policy server in response to a single request.
