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How to reduce email
Teach your email to recognize spam.
Mark messages as spam to have them automatically filtered out of your inbox in the future. When you receive spam, select the message and mark it as spam.
This will mark the sender as a spammer, and all subsequent messages will be diverted to your spam folder. Most web mail clients (like google mail, yahoo! Mail, outlook, and more) already have built-in spam filters that automatically move spam to your account's spam folder.