[Mimedefang] Greylisting a relay/email
Oliver Schulze L.
oliver at samera.com.py
Thu Aug 9 18:09:39 EDT 2007
I read the excellent post from David about using a tuple of data to identify
and greylist an email.
My question is about identifying the email and about greylisting a relay or
only a unique email comming from that relay.
Options to tempfail an email:
- on first spam received, greylist the relay IP and all emails comming
from that relay
- on first spam received, greylist the email asociating the email to the
all conections comming from that IP only if the relay is sending the
Also, I was thinking of using this info to uniquely identify and email:
subject, size, from, recipients, relay_ip
Doing a md5 sum of the entire email will help? Or will load the server
I have done some md5 test and it can indeed identify the same email, no
modification is done in the remote server, but maybe botnets can change
Oliver Schulze L. | http://tinymailto.com/oliver
Asuncion - Paraguay | http://www.solojuegos.mobi
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