if you don't look at SMTP alone, but at the whole suite of protocols and best practices, email spam has been a solved problem for over a decade compared to my

if you don't look at SMTP alone, but at the whole suite of protocols and best practices, email spam has been a solved problem for over a decade compared to my gmail, protonmail and other email clients/services, the signal-to-spam ratio on Twitter is less than 10% even for me — a nobody with <1k followers