How to check email valid or not | Bulk email verification tool free

thank u for this tool information .i was looking for in such tools. But when I am entering some email is says pls enter a valid email adds. when i collected that from a websites. response my comment. Any one can effort it, very cheap price compared to tools.

apni to bolen thiki kintu kono link e description box e add koren na.

Vai yahoo mail thik kora jay