DNS in xp_startsmtp

I'm having trouble with the xp_startsmtp in SQLA 12.0.1.  When I ping aspmx.l.google.com from the server the db is on, it resolves the name properly, but when I try to use that server name in xp_startsmtp, it faile with error 102, which is a name resolution failure.  If I plug in the IP address instead of the server name, it works fine.

What am I missing in the DB server's DNS capabilities?

Dave