Email spoofing is now a days is a vast problem for security.Hacker used this advantage and get ur personal information like password,username,Email-id(if ur fool).
Email spoofing is email activity in which the sender address and other parts of the email header are altered to appear as though the email originated from a different source.
But the question is why mail provider can not detect this kind of problem, first reason is SMTP(simple mail transfer protocol) can not use any authentication technique this is the main reason.
Good thing is mail provider is used spam detector and by using this filter some unwanted mail if u are marked as a spam and this kind of spam filter also done artificial intelligence for same kind of mail...
but now a days hacker use some new technique,that i post after some days....


So,Friend when u click on any link in ur mail please check ur the website adress.....