You're getting connection refused on the lmtp connection at delivery:

Jan 4 17:25:29 curley postfix/lmtp[20561]: A7E5626C257: to=, relay=none, delay=0, status=deferred (connect to quirkservice.com[141.154.98.120]: Connection refused)

So - either 141..... is the wrong IP, or port 7025 is blocked.