Untitled email pop up and I can't delete them.

cougrick wrote:

Untitled email pages pop up and I can't delete them.

drafts / blank windows /untitled

I would look for an email stuck in the Outbox of one of your email accounts. Remove the unsent email typically fixes the issue. Drafts is another location to check.

This can happen for various reason— ex sent email with an attachment too big and gets rejected by the mail server.

Delete the mail from the Outbox.

cougrick wrote:

Thanks. This has been going on for days. Other emails have been getting through, but when the stuck one went through the problem stopped.

Sounds like it solved your problem.

You can review how the new ASC works—https://support.apple.com/en-us/HT209031