ietf-asrg
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Re: [Asrg] whitelisting server and not users

2003-04-02 14:02:58
At 1:25 PM -0600 4/2/03, Steven F Siirila wrote:
Personally, I'd go a step further.  Associate an MTA connection with a
domain name.  In other words, require rDNS and use the host name returned
to look up a TXT record.  Using your above example, you'd have this:

Yes. But that particular step breaks 30% of the email out there (at least that's the number I've seen for email senders without proper reverse DNS). It may be high--but certainly no major ISP that has attempted to block on rDNS has kept the block--and they weren't even authenticating--just seeing if it was there.
--
Kee Hinckley
http://www.messagefire.com/          Junk-Free Email Filtering
http://commons.somewhere.com/buzz/   Writings on Technology and Society

I'm not sure which upsets me more: that people are so unwilling to accept
responsibility for their own actions, or that they are so eager to regulate
everyone else's.
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