Could it be that nobody has sent you any email?
If you get this message…
1. Try the 'Connection Doctor' in the Window menu. The status should give you an error message if something is wrong.
2. How did you send this email Javad?
Your email 'from name' has changed (all uppercase now), so either you have used an 'online webmail client', or you have changed the accounts details.
3. Do you have another email account to send test emails to the broken account (gmail or yahoo are free)?
4. Has your ISP changed, are you using a different provider or have you got a new modem/router or other device?
5. Did BT say what check they did? They may have only tested your phoneline/ broadband connection, did they give you settings for the account or confirm the ones you are using in Mail>Preferences, Accounts tab, in the BT account?
PS
You can read any follow up on the mmug-group on Google, just use the link at the bottom of these emails.
Re:co