Hi, I am Kelly wood. I am working as a technical support engineer. We provide you technical support for how to stop email spoofing in Gmail. If you don't know then be informed that spoofing is the act of impersonating in which a scammer tries to be someone else that he is not in reality. As a part of their attempt to make fools of people they pretend to be from any big brand. To win the trust of the victim they create an email id that looks strikingly similar to the original one. You must report it to the Gmail customer service if you find any such email. https://quickutilities.us/blog/how-to-stop-email-spoofing-in-gmail-protect-gmail-account-from-spoofing-attack