iMailToGroup 1.3 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This Mac application was originally developed by Blue Line Studios. IMailToGroup for Mac lies within Communication Tools, more precisely E-mail. We recommend checking the downloaded files with any free antivirus.
From the developer:
iMailToGroup is a bulk e-mailer to send out personalized messages to a list of recipients; an invaluable tool for managing mailing list sendouts. iMailToGroup is neither suited nor intended for spamming purposes. The unregistered version will expire after 12 times sending out bulk mail messages.
You may want to check out more software for Mac, such as Zimbra Toaster, PageSender or Mail to ToDo X, which might be similar to iMailToGroup.