Can someone give me a little more insite as tto what the HELO/EHLO domain validation test refers to? I.e. the test that generates the X-IMAIL-SPAM-VALHELO X-header.
Presumably, it makes sure that the HELO/EHLO hostname (the name the sender mailsever claims to be) is a valid domain (has an A record, although checking for an MX record as well is preferable).
For that matter, how is that differnte from the X-IMAIL-SPAM-HELODOMAIN?
I can't say for certain, but I would assume that header would appear if the HELO/EHLO hostname is one that you are choosing to block.
-Scott
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