Mail not receiving messages

Question

I just updated to Yosemite.  My Mail account can send messages but not received messages.  I tried creating a new account, but same result as my old account.  My wife has a Mail account identical to mine, except for her E-Mail address, and she sends and receives okay.  We have the same domain; just hers is [email protected]  Mine is [email protected]  The Connection Doctor successfully connects to both the incoming and outgoing mail servers.  The Activity Window shows:
      "[Don] Fetching new mail
     Preparing to retrieve messages...
for a long time and nothing else.
I did find the following messages in the System Log:
11/08/2014 3:33:09.074 PM    Mail[393]    -[MFPOPConnection fetchMessages:totalBytes:] failed: Error Domain=MCMailErrorDomain Code=1029 "The attempt to send data to the server “(null)” failed." UserInfo=0x608000650b00 {NSLocalizedDescription=The attempt to send data to the server “(null)” failed.}
Also I noticed in Mail is the menu Menu Bar>Mailbox>Get New Mail>Don is disabled, but Menu Bar>Mailbox>Get New Mail>Glenda is enabled.  Both accounts are shown being online.
Finally, I tried my account on my wife's MacBook Pro and my mail was received okay.  So it has to be something on my MacPro.
I've spent 2 days trying to resolve this issue without success, but I'm at a loss.  Any suggestions will be much appreciated.
Thank you,
Don
Message was edited by: DonLeckie

Answer 1

Launch the Keychain Access application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Keychain Access in the icon grid.
Use the search box in the toolbar of the Keychain Access window to search for the name of the mail server you're having trouble with. Double-click one of the items and check the box marked Show password in the inspector window. You'll be prompted for your keychain password to confirm. Make a note of the user name and password. Then delete every "Internet Password" item in the search results. Quit Keychain Access.
Quit and relaunch Mail. You'll be prompted for the account user name and password. Enter the information you noted earlier and check the box to save it in the Keychain.
Credit for this solution to ASC member Sandra Guzdek.