At the moment, he is neither SERVEd off, nor do you have any filters=.
Please check his particular subscription with a:
Q ISOGEOCHEM FOR [log in to unmask]
and see if there is a REVIEW or NOPOST.
Finally, why do you allow anyone in the world to REVIEW your list of
subscribers? and why don't you use SUBSCRIPTION= PUBLIC,CONFIRM?
/Pete Weiss