On 18/12/2024 16:00, Gellner, Oliver via mailop wrote:
The last two times an IP address which we are responsible for was explicitly listed by Spamhaus, Spamhaus said that this was due to a misconfiguration in their side. So we could have searched our logs forever without finding a malicious message. The operators of the DNSBL which we don't mention are not exactly known for admitting mistakes, so chances are that you will never find out the reason for the listing.
They also conflate multiple data sources about different threats. You might not actually even be sending a single bad email.
For example the "HELO" they display on their page can actually not be the HELO, it can just be a PTR they looked up when one of their other feeds contains your IP.
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