Comment Comment by adamsmith But most major domains use domain keys / DKIM.http://en.wikipedia.org/wiki/DKIMAs far as I understand it, you can't fake being an SMTP server sending mail from such a domain because their emails get signed with a private key whose matching public key is published by DNS. parent adamsmith 16 years ago
http://en.wikipedia.org/wiki/DKIM
As far as I understand it, you can't fake being an SMTP server sending mail from such a domain because their emails get signed with a private key whose matching public key is published by DNS.