This idea intrigues me....
On the one hand it seems quite neat - keeping a cache of addresses you
know don't work and saving yourself work by rejecting mail to/from them.
On the other, when it goes wrong, it will go really wrong....
Suppose aol's mailers have a brainstorm. For a few moments all mail to
aol gets an smtp permanent reject when the address is presented, and then
we reject mail from/to all sorts of random aol-ers for (say) a week. Poor
mail admin then has to clean up manually.
Or another scenario. Someone sends mail to me from your box, with a
sender address that happens to match something that I block as spam. My
local exim blocks it in the SMTP transaction - and it so happens that I
have things set to reject the recipients transactions. Then I find that I
cannot send mail to anyone served by your machine....
This would need keeping on a very tight rein....
Nigel.
--
[ Nigel.Metheringham@??? - Systems Software Engineer ]
[ Tel : +44 113 251 6012 Fax : +44 113 224 0003 ]
[ Friends don't let friends use sendmail! ]
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