One day I had to delete one of my many mail accounts set-up in Thunderbird. It wasn't as obvious as you would think so I thought I would share how its done. This is just a short step by step guide with screen shots, enjoy.

First click Edit from the top menu and then Account Settings [Figure 1}

Then select the account you wish to delete from the list on the left [Figure 2]

Lastly select the Account Actions drop down from the bottom left and then click Remove Account [Figure 3]

That's it! that account doesn't exists any more.