how to block any email address in yahoo, gmail and rediff mail

how to block any email address in yahoo, gmail and rediff mail
hello welcome to my youtube channal
aaj ki is video me aap ko batne wala hu gmaikl, yahoo,. rediff mail in teeno email service par kisi bhi email address ko kaise block karete h
ye tarika aap ke bahut kaam aa skta hai yadi aap faltu ke email se presaan hai to .

yadi aap ko video pasand aai to is video ko like kare share kre or sath hi hamare is channal ko subscribe kare jisse mere ane wali video ki jankari aap sabse pahale mile.
gmail.com
yahoo.com
rediffmail.com

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