[bebras]

Email spoofing

Email spoofing is the creation of email messages with a forged sender address. The core email protocols do not have any mechanism for authentication, making it common for spam and phishing emails to use such spoofing to mislead or even prank the recipient about the origin of the message.
Question: How does it work? The core email protocols do not have any mechanism for authentication.

So let's open https://emkei.cz/, and try to do it, in "From Name" field, input what should write in position where is typing your example: "Facebook", In "From E-Mail " field type what email do you want to spoof eg..: "[email protected]", in "To" field, write to who you want to send email. And then fill mail subject, text. And press "Send". So that's it.

Preview:

Note: If you see i did a mistake explaining please let me know in the comments.