Windows 8 Thunderbird Error Message?

I sent an email to my other account. I called it Test. Here's what it showed.Sending Message - TestStatus = mail sent successfullyProgress 100%(This stayed on the screen for 1 minute and 50 seconds)In the lower left corner of the screen it says mail sent successfullyIt did put it in the sent folder.The email never made it to the destination email address.If you send an email and cancel the sending email message you get the message.There was an error saving the message to. Retry?Click the ok Button and the message goes away.It did put it in the sent folder.