I'm not getting all of my email since Yahoo switch....does anyone think it will get better?

I am also not receiving emails.  It does appear to be random as it is not specific to a particular sender/domain.  The emails are not in SPAM they simply never arrive.  Of course Cox, though they "own" the email address say they have no responsibility as does YAHOO.  One of the worst business decisions I have ever run into.  I am trying to figure out a way to migrate thousands of clients to a different email.  This is simply terrible.