MailToBotic 1.0 for Mac was free to download from our application library. This software for Mac OS X was originally developed by moonapp. The application is included in Communication Tools.
From the developer:
MailToBotic lets you send mail in bulk using Apple Mail, and keep your precious mailing list safely with you.
Enrich and personalize your mails using as many variables as you want in the mail message. Especially created for small businesses, organizations, associations, user groups, etc.
You may want to check out more software for Mac, such as Installer OS X El Capitan, which might be similar to MailToBotic.