Milter-greylist

Hello,

A user of ours asked for something I will here call reverse
auto-whitelisting, that is to generate an automatic whitelist entry when
an email is sent from our MTA. There recipient and sender will of course
be reversed and any IP will do for the reply message. That way when the
off-site recipient replies to our on-site user, it will pass through
immediately.

For example:

A mail from me (me@...) to my friend (friend@...) from
our MTA (192.168.0.1) would create a reverse auto-whitelist entry that
looks like this:

* <friend@...> <me@...> 1155024907 AUTO # 2006-08-08
11:15:07

Does this sound useful to anyone else? Anyone already working on
something like it?

Cheers,
Fredrik Nyberg