On Sat, 21 Nov 1998, Greg A. Woods wrote:
> I guess if you want to generate
> nice bounce messages then you'll have to distinguish between valid
> sender addresses and invalid ones and base the decision of whether to
> validate RCPT TO addresses on that. I don't know if exim can do that,
If you turn on MAIL FROM validation, then the message isn't ever
accepted from an invalid sender.
Exim can also predicate validating RCPT TO on static checks of the
sender address (after it has been vaidated, which in practice means that
its domain exists). In fact this is what I do on this system. From a set
of domains that are deemed to be "friendly" (this is, sadly,
ever-decreasing) the validation happens later, allowing for friendly
error messages. For the rest, RCPT TO get validated.
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
--
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