Member not getting general topic Church emails

I am the Ward Clerk. Our RS President is not receiving general church emails. We are wondering if it is because her provider is @Hotmail.com and not a more main stream provider?
Thoughts?

We have this occur all the time regardless of the email address or calling of the remember. Randomly individuals don't get emails sent using the send message tool. I don't have a solution but having talked to other units this is a common occurrence.