On Wed, June 29, 2005 23:11, Matthias Haeker said:
now starting this weak german server stop to accept email
with something like:
MDeferred: 450 4.1.0 <someone(_at_)xxx-yyy(_dot_)de>: Sender address rejected:
unverified address: Address verification in progress
or:
MDeferred: 450 <anybody(_at_)world(_dot_)de>: Recipient address rejected:
Greylisted
for 300 seconds
with the rest of the world it is still working.
What can i do?????????
can procmail help me ????
They have implemented 'grey-listing'.
This basically works like this:
1) Deny initial contact with a temporary error 4xx
2) start a counter for X seconds
3a) Any reattempts before x seconds are over are denied as under#1
3b) Any reattempts after X seconds will be allowed and routed to the
recipient.
The idea behind this is that 99.9% of SPAM sending worms and trojans do
NOT have a retransmit on error function, so by denying the initial
attempt, you effectively block the SPAM...
When your server retries sending after the normal retry period (usually
somewhere between 5 and 60 minutes) the email will be accepted...
If you need more details, try googling for grey-listing...
HTH...
--
Francesco Peeters
----
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If your program doesn't recognize my signature, please visit
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