Rated 5 out of 5 stars

No flash, no splash,just does the job for you. Love it- set it up once and forget about it. Only improvement I could suggest (would give it 5 stars): auto fill the checkbox in the popup window when it appears- sometimes don't want all BCC so haven't set to always do it, and too easy to skip through that when keyboarding- done it twice. *5 stars as promised- that solution is even better than my suggestion.

This review is for a previous version of the add-on (3.2.0). 

Had a second request for something like this. Rather than burden all with having the checkbox set by default, I changed the addon to "remember" the last set state of that checkbox and restore the last state next time the dialog is displayed. So if it gets set at least once and not un-checked by the user at some point, it would appear checked by default.