I am reasonably sure that if we compare the number of MTAs sending
legit mail with numeric HELO to the number of spambots doing so, mail
reliability would be greatly improved by completely forbidding them.
This bias will also suggests the premise can be reasonably off as well.
We need to separate the SMTP protocol engine from the administrative
decisions with has inherent bias it in. Too much of this has been
going on for too long with the IETF Mail Cogs that quite frankly has
been predictably off now compared to current empirical observations.
We definitely need to make it clear in 5321bis that submission and
SMTP are different.
That is a good point. Unless the user is compromised, authenticated
input has never been an issue. The issue is SMTP compliancy as a
public port service. SMTP Compliancy should be a primary focus for
RFC5321bis. Everyone, enterprise including the "billion users"
systems to Mom & Pop shop is expected to have a minimum requirement to
adhere to.
--
HLS
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