Once upon a time in the past ...

Posted Dec 9, 2024 17:21 UTC (Mon) by raven667 (subscriber, #5198)
In reply to: Once upon a time in the past ... by zdzichu
Parent article: Debian opens a can of username worms

Fun, I tried thunderbird through o365 and Gmail, we'll see how it goes. The Gmail phone app rejected the address with an error popup as did the outlook phone app by marking it red and silently disabling the send button. No bounces yet.

Once upon a time in the past ...

Posted Dec 9, 2024 18:24 UTC (Mon) by zdzichu (subscriber, #17118) [Link] (1 responses)

Got one from you, replied.

I also got one from Alejandro, but did not manage to reply with fancy From:

SMTPUTF8 is required, but was not offered by host smtp3.kernel.org[44.230.10.245]

Once upon a time in the past ...

Posted Dec 9, 2024 20:05 UTC (Mon) by raven667 (subscriber, #5198) [Link]

My attempt through O365 was thwarted because our ProofPoint anti-malware/phishing system doesn't support utf8 addresses, but the `550 5.1.17 SMTPSEND.Utf8RecipientAddress; UTF-8 recipient address not supported.` bounce was filtered into Junk, lol.

The reply to Gmail with an ASCII address worked but the utf8 From reply was also filtered into Junk, but it did work.

I'm guessing that fake bounce messages are more commonly used for spam/phishing than real notifications which is why they are Junked repeatedly on totally different systems.