4 ms·
It seems many domestic hosted smtp servers are served as spam, even after an history of legit traffic. Pure IP SMTP or SPF forbid spoofing with proper analysis
by sylware 3y ago
It seems many domestic hosted smtp servers are served as spam, even after an history of legit traffic. Pure IP SMTP or SPF forbid spoofing with proper analysis of headers, namely we would be talking about pown accounts or servers.
But how to verify that? Only gmail people can tell us. And even then, we would have to trust people which interest is to kill alternative SMTP services.