What the error message says would be helpful.
Also, can you log into your server and delete the message there?
I.E. if your e-mail address ends @btinternet.com - you can log into bt yahoo - mail - inbox - and delete the message.
Samsung Galaxy S8 review
1995-2015: How technology has changed the world in 20 years
This 2D animation about monsters is illustrated in a Van Gogh painterly style
Siri not working? Try these troubleshooting fixes
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.