On 22-Jun-2009, at 18:29, mouss wrote:
Is there anyway to, if not outright reject anyone whose DNS shows
up as
unknown to at least tempfail them with a "Ooops, your DNS is not
resolving, try back later" or something?
if you insist, you could use one of
http://www.postfix.org/postconf.5.html#reject_unknown_reverse_client_hostname
http://www.postfix.org/postconf.5.html#reject_unknown_client_hostname
but use at your own risks. In particular,
reject_unknown_client_hostname
(previously: reject_unknown_client) _will_ block or delay legitimate
mail.
Will it block or delay it? Can I set the error code to a tempfail
instead of a outright rejection. Blocking legitimate mail that fails
dns checks is one thing, rejecting it outright is another thing
altogether.
Seems at least half the spam that gets by zen shows up as
client=unknown
how much is half of what...
I don't understand the question.
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