Site not sending to email address

Hello,
I have a member that is no longer receiving messages from our host but his email service says there shouldn't be a reason he isn't receiving them.
Please help me figure out what might be happening and see if we can get this figured out.

1147odell@arvig.net - not receiving emails
nicole@brainerdlakeschamber.com

Thank you!
Nicole Converse

So how about your club number???