Email Addon

Impressed with the quality of verifying accept-all emails. The free single email verification is also great for occasional email verification needs.

I've worked with a few other mail merge options, but this seems to be the most simple, effective addon. It's easy to set up and manage the templates, can preview with variables (like the first name), and can also send a test email. It's a great app (especially for the price :)

Best option to email signature manager