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Re: [Asrg] 6. Proposals: MTA MARK vs port 25 filtering?

Alan DeKok wrote:

John Levine <asrg@johnlevine.com> wrote:


I don't know of anyone who has much interest in getting SMTP
connections from random PPP and DHCP users.  I know that to a very
close approximation, that mail is 100% spam and viruses.

  Few people disagree with you there.

  See the list archives for flame wars involving people who want to
*send* messages from random PPP accounts, and random addresses via
DHCP.  Also note that there are zero responses[1] to requests asking
"what's wrong with SUBMIT, or umpteen other submission methods".

>

  Alan DeKok.
[1] I don't count responses which amount to "I don't want to change my
behavior", or "SMTP on port 25 is the One True Way to deliver mail,
everything else is evil."
Currently, I deliver mail from a cable-modem hosted MTA that also hosts the backup MX for a domain I share with some friends. I relay through smtp.comcast.net, so I'm not sure if you really count that. However, I have encountered systems that check each machine in the Received: headers against dialup/DHCP lists. Hell, on one occasion, smtp.comcast.net has been blacklisted, when if I could do direct delivery, my mail would have gotten through.
LMAP as an addition to the status quo would hurt me even more, because there's no possible way I could create acceptable LMAP entries for my domain unless recipients start accepting mail from dynamic addresses. SUBMIT is irrelevant here, because my server *is* the "real" one, the one that authenticates mail from my domain. So filtering mail from non-leased addresses is not just a matter of mail submission.
I'm quite willing to change my behaviour, if you can tell me how. I would be delighted to declare accountability for messages from my own server, if only to remove the need for my ISP's relay.

Philip Miller


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