How do I get a friend to receive these emails?

You can give her this link and she can check the forum at her leisure --

https://www.agingcare.com/caregiver-forum

I've never received an email from this site. I never sign up for them as I don't like my inbox to be cluttered up.

You could encourage her to join the forum Dave, or just forward the emails you think would be helpful.

Have your friend come to this site and sign up for an account. Then she'll get the emails as well as access to all the forum questions, articles and discussions.