Proxy-Cheap.com(@ProxyCheap):3 things decide how much you can trust an IP. → Blacklist status. If it's on Spamhaus, everything downstream gets harder. This needs ongoing monitoring because IPs get listed overnight. → DNS setup. A missing PTR record is an instant red flag for mail servers. → Network type. IPs from real ISP networks score better than datacenter ranges, because that's where normal human traffic comes from. Shared IPs are cheaper for a reason. Know what you're sharing.

2026.08.14 16:29

3 things decide how much you can trust an IP. → Blacklist status. If it's on Spamhaus, everything downstream gets harder. This needs ongoing monitoring because IPs get listed overnight. → DNS setup. A missing PTR record is an instant red flag for mail servers. → Network type. IPs from real ISP networks score better than datacenter ranges, because that's where normal human traffic comes from. Shared IPs are cheaper for a reason. Know what you're sharing.