Rated 4 out of 5 stars

Excellent work!. I have a comment, is that the e-mail I send and
receiving other e-mail clients, such as Outlook, they do not see
highlighted text, and I change if I see the highlighted text from those customers
e-mail I receive.

This review is for a previous version of the add-on (0.6.0). 

Thanks for the feedback

Yes, I am not totally surprised, as Outlook html engine uses the same as the one from word, which is not totally compatible. We have the choice between trying to produce incompatible html to fit outlook poor implementation, or to hope that outlook will involve soon.
I think I may add an option for this.