Unable to join K-9 Mail support forum - Not receiving registration confirmation email

[kingmustard]

My email address (a hotmail .com one) was definitely entered correctly, and there is nothing in the Junk folder.

Any ideas?

[kewisch]

I'd recommend asking at https://support.mozilla.org/products/thunderbird-android (even with K-9) for now. Is it the email on your profile? It appears discourse has sent the email, so either the email server is backlogged, or something made it not arrive. We recently changed SPF entries to fix them, possibly something is still not right so that the email are filtered out before they even arrive in your spam folder.