2017-06-19 16:13:52.129 [info] <0.760.0>@ejabberd_s2s_in:handle_auth_failure:201 (tcp|<0.759.0>) Failed inbound s2s dialback authentication jabber.ccc.de -> cweiske.de (::FFFF:146.255.57.226): Verification failed: Stream closed by us: Use of STARTTLS forbidden (unsupported-feature) (remote-server-not-found)