my cox email not receiving gmail

Hello, I also have a gmail account for my PTO school email. I send daily things on my gmail account to a group of PTO moms. Starting today my email is not getting to any of my cox email moms or myself who has cox for personal. I logged onto cox and there is no blocked senders or anything in spam. It is showing up in sent on gmail and everyone but cox emails are receiving the emails so I know it is not a gmail problem.

Help!!