Thunderbird showing "Unable to locate mail spool file" on installing gmail account in ubuntu 13.04?

I just configure a gmail account in thunder mail but its continuously showing me error "Unable to locate mail spool file." when i click get mail then also it shows same error. its not retrieving mail from gmail. I tried moving /var/spool to .Thunderbird but that also not working. What to do ??

Solution 1:

Make sure thunderbird is closed.

Just go to the file browser and type CTRL+H to reveal hidden files, then delete the .thunderbird folder.

After that, thunderbird should open fine.

Solution 2:

I was creating a localhost only environment to test email sending during development and faced this error message.

The reason was: my user spool mail file was really empty.

To solve it, I just composed an email to myself and clicked on Get Messages. Spool created and problem solved!