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Re: [ietf-smtp] why are we reinventing mta-sts ?

2019-10-06 19:30:17
On 10/6/19 8:10 PM, John R Levine wrote:

In article 
... If an MX record with target smtps- or starttls- isn't signed
using DNSSEC, it's not clear that the client should trust the smtps- or
starttls- prefix, and that the client should drop mail that can't be
relayed that way.??...

What's wrong with MTS-STS defined in RFC 8461?

It's defined, it works, it's deployed at a lot of large mail systems.

I hope MTS-STS turns out to be sufficient.   But I've seen so many attempted solutions fail for one reason or another that I don't think it hurts to discuss potential alternatives.


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