I am getting flooded with messages about my email. My original email (tidbits@paulc.com, my own domain) worked just fine for years until 4/28/25. I have verified it as correct at least half a dozen times… i.e., I can send mail to it and get the mail delivered. A few months back, I THOUGHT I had changed it to another one, but after digging around, I see it wasn’t changed. Pretty sure I went through the process. So I again tried to change that email BUT it seems I can not change it because “Email can be updated from authentication provider..” I have no idea what that means, but I have no ability to actually change that email.
If someone would send a direct email, not through your system, you may see the address as correct. My suspicion is the mail is dying inside your system. Not sure what to do now…