Are you referring to Mike Geary?
Is yes, I think those emails may not be from him. Maybe it´s someone pretending to be him.
I suspect this for two reasons. One, I´m on his mailing list and I don´t receive emails form him that regularly.
Number two, I can click unsubscribe on the bottom of all his emails at any time, to stop receiving his mail.
If you have further questions, dont hesitate to ask.