> On 15 Dec 2020, at 15:18, Bill Cole via mailop <mailop@mailop.org> wrote: > > On 15 Dec 2020, at 6:14, Jaroslaw Rafa via mailop wrote: > >> But I assume the mailserver didn't get a *positive* reply "yes, it is >> confirmed that the user DOESN'T exist" but simply wasn't able to connect to >> the database and verify whether the user exists or not. > > That assumption is called into serious doubt by the fact that GMail is > replying with a very specific extended response code which states the exact > opposite of the assumption.
Gmail was (and still is) sending out false ‘unknown address’ responses. One person ever reported their own (working, logged into) gmail address bouncing. laura -- Having an Email Crisis? We can help! 800 823-9674 Laura Atkins Word to the Wise la...@wordtothewise.com (650) 437-0741 Email Delivery Blog: https://wordtothewise.com/blog
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