Where do we stand with SPF usage on HELO/EHLO?
The establishment of "capitol" out there in the net in the
form of the thousands of domains that publish SPF records
may or may not be used to check MAIL FROM: but can most
certainly be used to check HELO/EHLO. Yet, I am still
getting static when I bring this up in other forums.
("SPF breaks forwarding... blah blah")
Using SPF on HELO/EHLO is a straightforward and effective way
to prevent forgery of MTA identity, and though not directly
effective in suppressing SPAM, it's a vital pre-requisite to
reputation scoring of MTAs.
Is there evidence of progress on this front?
-dgl-
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