SORBS Aggregate Zone (Problems)
SORBS typically includes email servers suspected of sending or relaying spam, servers that have been hacked and hijacked, and those with Trojan infestations. In an attempt to provide preemptive protection, SORBS also lists servers with dynamically allocated IP addresses.
If you are listed in the ‘spammers’ database, it is because you, your machine, or a previous user of the address sent unsolicited bulk, commercial, religious or political email to one of the administrators of SORBS or any of the spam traps SORBS operates. If your IP address is listed in SORBS Spamhost (last year) and/or in SORBS Spamhost (last 28 days), it will also be listed in SORBS Aggregate Zone (Problems).