Babydoll, woah... didn't expect to be reading this.
Okay... first of all you need to show your WH that you are strong. He is clearly not strong today and is in his "fog" It's YOU that needs to be strong, for YOU first, him SECOND.
Don't read too much into his email...Let him figure himself out.
This could be a sign that his fog is lifting, but don't trust it and don't invest in it. Keep an EYE on it.
And yes, avoid commuinication unless it is going to show you in a positive and strong light (hanging up - I did it all the time - but it's lack of control).
Ignore his texts. And the 2nd. Reply to the third. He's DIVORCING you remember? Don't initiate contact. If you do communicate be civil, even friendly, but scarce on words. Make him earn your respect.