Some of my email messages (sent from mydomain.com) just fail, message is returned with the following explanation:
Delivery to the following recipient failed permanently:
info@somecompany.com
Technical details of permanent failure:
Message rejected by Google Groups. Please visit http://mail.google.com/support/bin/answer.py?hl=en&answer=188131 to review our Bulk Email Senders Guidelines.
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I have no idea what Google has got to do with it? How do I avoid this?