delivery failure

my live mail e-mails are not being delivered to my PC. before Christmas E-mail from Outlook upgrade for live mail needed or service would cease uploaded 'fix' all ok until yesterday E-mails not delivered used repair function in Progs Uninstall/change selected repair it ran said fixed no change...

I am receiving email via my new Windows 10 Email (not Outlook). People have sent me emails with attachments and the attachments aren't there. I have had to go to my ipad to see attachments. That's embarrassing. Specifically this has happened with Word Docs... .doc or .docx.

I just received an email delivery failure notification from my ISP for a message that I sent a few days ago. It raised a couple of questions about what personally identifiable information is normally sent to email recipients? I do know that all email are traceable back to the sender, at least...

Somehow a website went out to my whole contact list and I did not send it. It said "mailer-demon", "failure to deliver". I checked for viruses and it was clean. I am getting emails from over 30 people on my contact list asking if I sent it. It was a clean website that was on the front page...