specifying which IP addresses can send mail for a domain
Joel, can you please provide information on the experimental method for
specifying which IP addresses may be used to send mail from a particular
The method of using DNS to specify that only certain IP address ranges may
send mail purporting to be From: your domain has the potential to offer
significant benefits for spam blocking as well as allowing us to reduce our
reliance on other methods (eg the contentious services such as
dynablock.easynet.nl which get debated on these lists).
I would be happy to configure my servers to avoid checking the dial-up lists
if such a method could be used instead, and I think that this would make a
lot of people happy.
The method in question has never taken off because of lack of application
support. If we make all mail servers in Debian support it then that could be
what is needed to make it a success. I would be happy to devote some coding
time to this if it can result in a net reduction of SPAM.
http://www.coker.com.au/selinux/ My NSA Security Enhanced Linux packages
http://www.coker.com.au/bonnie++/ Bonnie++ hard drive benchmark
http://www.coker.com.au/postal/ Postal SMTP/POP benchmark
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