On Mon 05/Jul/2021 14:45:30 +0200 Florian Effenberger via mailop wrote:
Their website lists the IP as yellow ("Suspicious"), with an explanation of "The IP has only recently started sending mails, and therefore still has an Unknown reputation".
I tried https://www.cyren.com/security-center/cyren-ip-reputation-check-gate and it says "No Risk" for 188.34.176.133 and "Please enter a valid IP" for 2a01:4f8:c010:587c::1. Is it the latter the one that gives you problems?
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