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The From header has always been spoofable. It's just most ISPs (and Google) chose to disallow it to address low-hanging fruit in the fight against spam. But an
by athenot 8y ago
The From header has always been spoofable. It's just most ISPs (and Google) chose to disallow it to address low-hanging fruit in the fight against spam.
But anyone can set up their own postfix/qmail/sendmail server and put anything they want as the From.
Or am I misunderstanding the issue here?
- m4lvin 8y agoThe difference is that using another fastmail account to spoof someone@fastmail.com will make the email look much more legitimate (DKIM and SPF wise) to other servers than when it comes from your random.emailserver.domain.foo.