I am using Outlook for mac 2011 in my i Mac( mountain lion) .  Now  when I clicked to open Outlook, it taking  very long time to receive the emails.  Hundreds of mails still pending to receive. Sometimes only one mail be fetched in a day. And the email dates coming in outlook inbox is different with original. I have another Macbook Air and the same email configured  in there also. There is no such problems everything working fine. 

Any idea? Please give me solution.

Thnks