Sorry, late to the game...
On 4/17/2022, John Levine via mailop wrote:
It appears that Tobias Fiebig via mailop <[email protected]> said:
If your friends somehow believe that Gmail is the only mail provider in the
world I suppose I am sorry for them but I don't understand why that is anyone
else's problem.
The idea is that you give away something for free, gain significant market
share (=network effect), and then get into a position where you can first push
standards (hello
MTA-STS), and later can migrate to a walled garden, ...
Uh, what? Google follows public mail standards at least as well as
their large competitors like YahAOL and Microsoft. You do not have to
like MTA-STS, but it's an open IETF standard and there's a lot more
providers than Google that use it.
I'm going to disagree. To the best of my knowledge Yahoo, Vz, AOL, or
Microsoft do NOT re-queue messages after receiving a 5xx response --
Qmail does.
I don't know if this is because their system expects a specific text
response, if they expect enhanced status codes (even when the remote
doesn't respond to EHLO with ENHANCEDSTATUSCODES), of if Google simply
believes that sender's policy trumps receivers policy.
--
SgtChains
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