Error while Fetching Mail.Cannot append message to mbox file:/home/thomas/.evolution/mail/local/Inbox: File too large

At times you cannot POP your mails from the server and the error returned is <Error while Fetching Mail.Cannot append message to mbox file:/home/thomas/.evolution/mail/local/Inbox: File too large>
I am going to show you how I went over it,
In the first place, you need to have some simple knowledge of the command line then you should be knowing the home directory you are working with.
1. Login into the machine (CLI) with the root account, Am using Ubuntu 10.04 and i let ma root account run all the time ( I no longer use the sudo command, but I directly login into ma root account with su)
2. Navigate into the directory (Using cd)that is holding the mail, in this case, /home/thomas/.evolution/mail/local [In this case replace the username with thomas]
3. Rename the Inbox file to another file and automatically a new Inbox file shall be created.# mv Inbox Inbox.old
4. Restart Evolution and do a send/Recieve