Und tatsächlich, https://www.dnsbl.us.sorbs.net/lookup.shtml bringt
für die IP 64.233.170.197 nen Eintrag...
Address: 64.233.170.197
Record Created: Mon Nov 22 00:20:37 2004 GMT
Record Updated: Mon Nov 22 00:20:37 2004 GMT
Additional Information: Received: from rproxy.gmail.com (rproxy.gmail.com [64.233.170.197]) by mailhub2.uq.edu.au (8.12.11/8.12.11) with ESMTP id iALCUhrL050707 for <[email]>; Sun, 21 Nov 2004 22:30:44 +1000 (EST)
Currently active and flagged to be published in DNS
If you wish to request a delisting please do so through the Support System.