Ironically, as email services are making creating new accounts even harder, by adding mobile phone verification and Google outright blocking "untrusted" clients

Ironically, as email services are making creating new accounts even harder, by adding mobile phone verification and Google outright blocking "untrusted" clients - spam count keeps growing from gmail and outlook (hotmail) domains. And looks like gmail spam filter ain't very good either, as no matter how many spam letters you mark as spam, one definitely will get through in the future. Another problem, that one cannot ban gmail or outlook domains for incoming spam, as most business contacts are usually using those.