I interpreted the reference as being to Google's email product, not search. As a techie (but not email expert), I have tried to run a couple small mailing list

I interpreted the reference as being to Google's email product, not search. As a techie (but not email expert), I have tried to run a couple small mailing lists for community projects over the years, and wound up giving up because of gmail/hotmail/etc's aggressive spam filters catching too many of our legit emails.