> the whole email system is more or less centralised due to attempts at combatting the issue Do the big email providers even attempt to combat spam? I got an e

> the whole email system is more or less centralised due to attempts at combatting the issue Do the big email providers even attempt to combat spam? I got an email from booking.com yesterday that literally contains the text "This message is an advertisement." From what I can tell, Gmail hasn't maintained their spam filters in at least a decade.