Hi,
The problem is more serious than that and will not resolve itself.
I talked to Yahoo tech support and the person I talked to spoke to a higher up and here is what I was told:
I was told to contact the companies, or people, that I was not receiving the emails from and ask them to update their security settings and that there is nothing that Yahoo can do at its end as they won't accept emails from sources that don't meet Yahoo's security needs.
So as I understand it, if you can't get emails from ftb.ca.gov then FTB needs to update its security settings for the email to get through to Yahoo.
I was told by the tech support person that it was my responsibility to get the problem solved not Yahoo's.