WH, I hope today is a good day for you. You've had a number of days recently of being "beaten up" so to speak. As for the mail, document what you've seen, especially the letter from the Diamond place.
Yes, your h back pedaled when your attorney fired off a response. The remark your h made about getting attention is absolutely correct...but unfortunately, he made him look like a bigger fool than he already is. He better watch himself because when it comes to court time, your lawyer just may pull that rabbit out of the hat and your h will look like the fool in front of the judge. I don't think any judge will tolerate a lot of bs when it comes to divorce and support issues, especially when one party hasn't been cooperating at all.
Of course, he's walking around w/his tail between his legs...he got his hands smacked about accusing you of being w/om and other things. I'm glad your lawyer responded so quickly to him. That little trick didn't work for him, so he'll have to think up another one...but you and your lawyer will tackle that one when it comes along.
For today, find something enjoyable to do...even if it's sitting outside eating an ice cream cone. You deserve a day of peace.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.