Marc Perkel wrote:
> The idea here is to not bounce email until they have a chance to fix it.
> So I could flag a destination host to treat 550 errors as 421 errors for
> short periods of time.
As you have to handle the mail in some special way anyway, why not write
a router which defers the mails or better, spools them into bsmtp-files?
Saves you a lot of trouble and does not break the protocol.