July 1, 2012 
Good overview article in Macworld of why you might want to use a group email service. MailChimp gets a mention. It does not appear to attempt to evaluate the services mentioned, merely make people aware of the options. For my money, MailChimp rules on features, friendliness and use.
Related Articles:
MailChimp Integration with FileMaker Pro – Part 2 of 3
FileMaker MailChimp Integration – Part 3 of 3
HomeBase Software 
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