Sure, I understand that. The problem is not that this specific message was rejected (and I actually appreciate we had an error message on that one), the problem is that after this message, none of our emails sent from all our account don’t reach our gmail contact without receiving any error message. They just vanish. They leave our server but then, no news from them. I guess they reach google server but I don’t have news from them after that…
Nope
and I have a 10/10 score to https://www.mail-tester.com/ and I’m not blacklisted to anywhere in https://mxtoolbox.com/
Not even with K9mail anymore as I can send to all other major email provider and I don’t receive any error message from google…
Isn’t it weird? I have tried to contact google on their G suite administrator but a guy told me that I’m not member of G suite so I cannot get answer here… Is there any known support service of Google?