[Exim] acl_smtp_quit ?

Hello,

I could give you the reason behind this apparently odd request (a
better greylisting mechanism for instance), but I limit myself asking
what do you think about adding a QUIT phase acl. Its result would of
course be ignored, actually, and the connection would be closed as it
is now, but the content of the acl would be executed. For instance in
the case of greylisting one could add the sender/ip pair to the
database *only if* the peer *does* issue a QUIT.

Thoughts?

Giuliano