Email account number instead of my name in sent emails

Question

Upgraded to Mavericks recently and now my sent emails show my internet account number not my name.  My provider (Bell) says it's a Mac issue, and as the emails send perfectly from their BellMail site it does point to being an Apple issue.  Full name details are shown correctly in Mail Preferences, but any email I send only has the account number in the 'From'.  Any ideas?

Answer 1

Constant requests for password generally indicates you need to add password again in the Account.
1) Open Keychain Access in Applications/Utilities. Run Keychain First Aid.
Choose Keychain Access > Keychain First Aid.
Enter your user name and password.
Select Repair and click Start.
If any problems are found run again to verify all repaired.
For good measure, run Repair Permissions in Disk Utility.
Next, open Mail. Under Window in the Menu bar select Connection Doctor. You will see green to indicate a connection and red to show there is a problem. Except for iCloud account you'll see two entries for each account 1) receiving and 2) SMTP for sending.
Edit Receiving password in the main Account window. Enter password then click out to select Save. Verify in Connection Doctor that it is now connecting.
EDIT SMTP SETTINGS
In Accounts window > Outgoing Mail Server SMTP:  select to Edit SMTP Server list... from popup.
Select account in the list.(It's not uncommon to find extra SMTP servers listed. When you remove account, Mail does not delete the smtp info. You might need to do some clean up in the list to remove the extras.)
Under Advanced Tab:
Apple defaults to the default ports (25,465, 587) but some servers prefer a custom port. Check to see what port they recommend. Gmail for example likes 465, Outlook.com 587.
Verify if your server require SSL.
User Name. Enter full email address  eg.  [email protected]
Add password if it is blank.(If you have two step authentication setup, you'll need to get an app specific password  more info)
http://www.google.com/landing/2step/
Open Connection Doctor under Window in the Menu bar.
Do you see green light now for your account SMTP?
Let me know if this helps.