MailToBotic let you send out mails, even html mails, using your favorite Apple Mail client. You can also make use of the advanced option to make use of variables. With variables you can enter personalised information in each out going mail. You can enter as many variables as you need.
What's new in version 1.0.6
ReleaseFebruary 11, 2016
Date AddedFebruary 10, 2016
Operating SystemsMac OS X 10.11, Macintosh, Mac OS X 10.9, Mac OS X 10.10, Mac OS X 10.8