On 1/2/20 2:08 PM, Dave Crocker wrote:
I mean a server that accepts incoming mail on behalf of a mail
domain. Normally they are advertised using MX records. Sorry if
that wasn't clear; I thought "MX server" would be an unambiguous
shorthand.
To me the point at which a message crosses a boundary between mail
domains
ahh. ack.
You meant something like: "the sequence of hops starting with the MSA
and ending with the receiving MTA at the destination site".
Actually I was trying to focus on the single hop between the last MTA of
an originating domain and the first MTA of the destination domain.
I'd misunderstood and thought you meant that the MSA interacted
directly with the receiving MTA.
That is possible (and in some cases desirable IMO). But it's neither
required, nor what I understand to be typical of today's operations.
(At the same time I question the assumption that all uses of IP address
literals in EHLO can reasonably be confined to submissions.)
Keith
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