Tom Smith writes:
Is it safe to assume that most MTAs will give up trying after four or five
days if a message is still undeliverable, even if it's getting a temporary
error? (The spam I referred to is dated in 2003, but I don't want to set a
date limit that old--perhaps a week or two.)
Sort of safe, but maybe not safe enough... be friendly about the bouncing,
set it to a month to begin with, and do it with a friendly "maybe your clock
isn't set right"-soft of message... The spammers shouldn't see/care about
such messages, but the false-positive positive-victims might see it.
To be even more on the safe side of things you'd of course just log these
these things for a couple of weeks before setting it to actually bounce,
but, hey, we both know that you won't do that... ;-)
/Tony
