On Thu, 21 Feb 2019 at 14:03, Val Kulkov <val.kul...@gmail.com> wrote:
> Also, it seems to me that even permanent static IP addresses are not made > the same. I get a feeling that some spam databases do not "like" certain > ranges of IP addresses. Although I have no direct evidence of it, I suspect > that these spam database sites run periodic checks on how much spam a > subnet produces and when it exceeds some threshold the entire subnet is > marked "dirty". > Forgot to mention http://www.mail-tester.com/, a site I periodically use to check how spam databases treat my ip address.
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