How many more "ANTI SPAM" prinzips i must learn to send a simple Email ????
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...
When i change the name of the local smtp host to xxx.de, .... this receiving
servers accept our email.
resulting in a header like this on the receiving host:
Received: from xxx.de (xxx.de [123.123.123.123])
by world.de (8.13.4/8.13.4) with SMTP id j5T7j84I015870
for ; Wed, 29 Jun 2005 09:45:11 +0200 (CEST)
(envelope-from someone(_at_)xxx-yyy(_dot_)de)
Envelope-To:
the asian.... will not acceept
when i send email from the web client of xxx-yyy.de all accept
with a header like this on the receiving host:
Received: from xxx-yyy.de (xxx-yyy.de [252.252.252.252])
by anybody(_at_)world(_dot_)de (8.13.4/8.13.4) with ESMTP id j5T7jDIl015888
for ; Wed, 29 Jun 2005 09:45:13 +0200 (CEST)
(envelope-from someone(_at_)xxx-yyy(_dot_)de)
Envelope-To:
is there a way to got this ???
to erase the first envelope and resend the email from xxx.de with xxx-yyy.de
???
Matthias Haeker
mhaeker(_at_)its-h(_dot_)de
***
----- Original Message -----
From: Francesco(_at_)fampeeters(_dot_)com
To: procmail(_at_)lists(_dot_)RWTH-Aachen(_dot_)DE
Sent: Wed, 29 Jun 2005 23:37:32
Subject: Re: genuine email got blocked as spam
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
----
GPG Key = AA69 E7C6 1D8A F148 160C D5C4 9943 6E38 D5E3
7704
If your program doesn't recognize my signature, please
visit
http://www.CAcert.org/index.php?id=3 to retrieve the
Root CA certificate.
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