These are HTTP errors in the logs:
Mar 28 09:58:04 auth: Debug: client in: AUTH 1 PLAIN service=imap secured session=lmNw8SeFoMl/AAAB lip=127.0.0.1 rip=127.0.0.1 lport=143 rport=51616 resp=<hidden>
Mar 28 09:58:04 auth: Debug: policy(unclroot,127.0.0.1,<lmNw8SeFoMl/AAAB>): Policy server request JSON: {"device_id":"","login":"unclroot","protocol":"imap","pwhash":"68","remote":"127.0.0.1","tls":false}
Mar 28 09:58:04 auth: Debug: http-client[1]: request [Req11: POST https://ourdomain:8084/?command=allow]: Error: 9003 Couldn't initialize SSL context: Can't verify remote server certs without trusted CAs (ssl_client_ca_* settings) Mar 28 09:58:04 auth: Error: policy(unclroot,127.0.0.1,<lmNw8SeFoMl/AAAB>): Policy server HTTP error: Couldn't initialize SSL context: Can't verify remote server certs without trusted CAs (ssl_client_ca_* settings)