On Fri, Feb 05, 2021 at 04:45:10PM -0500, Wietse Venema wrote:
> > If recipient address rewriting is on input (virtual alias maps rather
> > than on output (as with local(8) .forward, or local aliases(5)), then
> > one way is perhaps with recipient_address_verification probes and a
> > transport table that routes over-quota recipients to a an "error"
> > transport.
>
> reject_unverified_recipient is an interesting idea. It provides the
> routing and caching, and is designed to be exact.
For the record, this is not a new idea, I don't recall who suggested
it first, but it has been around for a while:
http://postfix.1071664.n5.nabble.com/Technical-question-to-Postfix-td52133.html#a52188
Dovecot has some sort of "quota-status" service that could perhaps
also be used in some fashion.
--
Viktor.
