Content of the above:

{
  "ts": 1721224896826,
  "type": "denied",
  "direction": "inbound",
  "uuid": "62180KLK-4A80-G73N-N204-7C91D3HXD.1",
  "messageId": null,
  "mailFrom": "<orders@awesome.com>",
  "spamStatus": null,
  "mailbox": null,
  "quotaPercent": null,
  "rcptTo": [],
  "remote": {
    "ip": "222.222.222.222",
    "port": 33870,
    "host": "mail.awesome2.com",
    "info": "mail.awesome2.com",
    "closed": false,
    "is_private": false,
    "is_local": false
  },
  "authUser": null,
  "relaying": false,
  "pluginName": "rcpt_to.in_host_list",
  "errorCode": 902,
  "message": "Mail from domain 'awesome.com' is not allowed from your host",
  "rejectionCountLastHour": 0
}

The thing that stands out is the IP in the content (222.222.222.222, masked for privacy). It's my old Contabo IP. I'm with Hetzner now. To get SMTP to work (if you read my other post), I had to reassign a new IP to the Hetzner server, so that's two different IP's. I've resynced the DNS, double-checked the records for all domains. Why is the old contabo IP still in rotation?

Now to the real problem, I cannot receive mail sent to Freescout. I created new mail app passwords and re-added, tested connections, and re-read the docs. I've been using these settings successfully. I'm sending and receiving mail fine in Roundcube. Sending works for FS. Fetching is the problem. It seems that FS can fetch it if it's a ticket reply, but fetching a newly sent in ticket is the issue. I'll worry about FS later.