I searched for all of the lines with “blacklisted at pbl.spamhaus” in the last 30 days. I massaged the file so I could manipulate it in Excel. I deleted all of the real spams and wound up with 46 instances of pbl giving false positives. No problem existed from 10/18 through 11/04, then there were several, and a whole ton of them today. To the end of each line, I added the actual domain name of the IP address. I checked every IP against spamhaus, and none was listed.
I know for a fact that most of these are not newly-acquired IPs, and suspect that none are. The IPs for our domain have been constant for several years. My personal;, family domain is unchanged since its creation. My customers haven’t changed their IPs. There even was an email rejected from supportus@astaro.com from 213.144.15.13 – doesn’t that strike you as unusual?
I have removed zen.spamhaus.org and now have only sbl-xbl.spamhaus.org and cbl.abuesat.org as explicitly-named RBLs.
It's very strange that the Astaro continues to reject emails based on pbl.spamhaus.org in spite of the fact that I've disabled 'Use recommended RBLs' and only explicitly listed the two above. I've now deleted all spamhaus RBLs, but continue to get rejections based on pbl.
Cheers - Bob
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