Not getting listed on Spamhaus was a constant battle. One time our network engineer made a huge mistake by announcing 15-20 /20 blocks registered with RIPE out of the US ASN. Spamhaus apparently automatically scans for this type of suspicious behavior and falgged like 20,000 ips.
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Not getting listed on Spamhaus was a constant battle. One time our network engineer made a huge mistake by announcing 15-20 /20 blocks registered with RIPE out of the US ASN. Spamhaus apparently automatically scans for this type of suspicious behavior and falgged like 20,000 ips.
https://en.wikipedia.org/wiki/Autonomous_system_(Internet)