Hide my email Issue on Apple Mail won't let me use my other aliases email addresses

Having the same error message - total PIA! They only workaround I can find is to ‘Reply’ to an older message (doesn’t matter to whom), then change the recipient, subject etc - that picks up my .me as sender address, but then the message gets filed under the wrong thread.

Not much info out there - hoping it’s a bug that’s addressed soon! Maybe turning the Hide My Email feature off might work 🤷🏻‍♀️

I am experiencing the same issue for a week or more. Apple Mail (Sonoma--latest version on MacBook Pro). At times, the full list of aliases will appear when I wish to reply to a message for no good reason, except possibly when I signed into iCloud Mail. I have been using ICould Mail as a workaround when I send a message from any of my email aliases.

I'd guess it's.a bug that will be addressed with an update at some point.

Problem persists...

Okay, this is weird...I've noticed in Mail under Settings and iCloud accounts that my default email address is a blank space. One can add it manually and then can add aliases, too. I have found doing this, at least, the Hide My Email is not the default responder but rather my primary mac address and the aliases that I added. All of this was routine once upon a time.

Just an update:

I phoned Apple Support and they were most helpful and indicated that this is a "known issue" that has been referred to Apple engineers and a solution should be forthcoming, no timeline given.

Same for me, only on my mac with Mail. it comes randomly on new email or on reply. try many things but still coming back...