I know Yahoo and Gmail do not accept it. But I want to know if it's possible for a person to create an email address with double @ in address and if they can receive emails with that address?
For example: info@stackoverflow.com@example.com.
I do not want to use this non standard format, but I want to know if a hacker can do it?
As this question's answer says:
The local-part of the e-mail address may use any of these ASCII characters:
- Uppercase and lowercase English letters (a-z, A-Z)
- Digits 0 to 9
- Characters ! # $ % & ' * + - / = ? ^ _ ` { | }
- Character . (dot, period, full stop) provided that it is not the first or last character, and provided also that it does not appear two or more times consecutively.
so it is usually not allowed :)