Rated 3 out of 5 stars

Not sure this is the right place for bug reports, but I don't see any other contact option.
Using Thunderbird 3.1.10 and noComposeAccount 1.0 with the option of leaving the sender account blank. If I forget to select an account and hit the send button, a pop-up message warns me to select one, and the send button turns grey. However, even after I select an account, it remains grey and I can't send the e-mail anymore, no matter what I do... would be perfect otherwise!

This review is for a previous version of the add-on (1.0). 

First of all I must apologize for not adding a support email address to the add-on listing earlier on.
The few tests I've done have not been able to reproduce what you describe.
Please feel free to get in touch with me and we'll figure it out.