Quick overview - had to move my current working NS8 server from one device to another. It is on a proxmox 8.x, Debian 12, with more memory and hard disk space now.
I had to do a restore to this server and finally got everything setup properly on the server and the firewall.
At this time, it looks like everything should work, I can send emails, but can not receive emails. So I started to look around, long story short I finally tracked it down to my DKIM.
I believe the last couple of times I have installed email server on NS8 with a domain I went into domain and under the three dots I could see configure DKIM.
Yes. Sorry! You are correct. I have been working on too many things at once. I don’t even know why I thought it was there. I guess it was because the word Domain was visible over on the left. I forgot to go to the mail app on the right side hidden panel - my bad.