relaytest.kundenserver.de

Host 38.107.191.83 is not listed in our database.

Lookup via DNS: 38.107.191.83 is NOT listed as an unsecured relay.

If you don't know why a host is (not) listed, take a look at our FAQ.
The exact criteria for when a host is being listed as an unsecured relay is described in the admin section.

Detailed information on how to fix open relays can be found at http://mail-abuse.org/tsi/ar-fix.html.