None of these work for me.

I have unlinked and then re-linked the inboxes. I have opened a message in a new window and closed it again. I have removed the inbox from Favourites and then replaced...

Oh Wow Bastet, you've sorted it. The instant that the email came in from this Forum, to tell me that you'd posted this, it cured the problem!

Good suggestion: I found a couple in the Junk folder but I've deleted them and it's made no difference

The Windows Mail Icon in my taskbar persists in showing me that there is one notification, even though I have no unread emails and there is no notification in the Action Centre.

Is there an easy...

I'm still puzzled about this. After studying the problem, it seems as if when I reply to an email which contained a link to a website (such as a company website that is referenced in their signature)...

I've seen some of them in my "sent" box, after the recipients contacted me to say they couldn't open the attachments. The question is, why are they there?

When I reply to an email, Mail keeps adding spurious PNG files to my messages. They definitely aren't there when I hit "send" or when they're in my outbox, but they are attached to the mail before...