How can I send emails from my email address to my spouse on his email?

I used to be able to send emails to my husband who also has a Yahoo email address but nothing I sent him gets to him. Why?


I have mail plus. Does he also have to have mail plus? The only mail he gets is from me and junk mail. Now he only gets junk mail (spam). I really appreciate whatever help you can give me.
How can I send emails from my email address to my spouse on his email?
Did he accidently mark one of your letters as spam and thereby sending everything you sent him after that to the spam folder by default? If so he has to go back through and mark as not spam.