Comment 29 for bug 197290

Hey JohnT,
I had exactly the same problem and the only way to resolve that was deleting enought files to allow archivemail to handle 4 gigas (two for the Inbox file and two others for backing up it seems). Once I had space enough it worked well.
So, you need to make more space on your hard disk.
If you delete Inbox you will lose all your mails placed on inbox. Evolution will work but it won't show you your emails from Inbox (because you deleted them). All the other folders you have will be shown without any problem.
Good luck
Jashk