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Re: [ietf-smtp] Endless debate on IP literals

2020-01-03 09:13:09
And I expect what that means is that a mail relayer can’t tell by the port used whether to act as an MSA or an MTA.

Huh? Mail servers have been doing relay and submission on the same port for decades. This is not an obscure situation or an unsolved problem.

John Levine, johnl(_at_)taugh(_dot_)com, Taughannock Networks, Trumansburg NY
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