> > Allow me to pose a slightly different scenario then, but still related > to my original doubt: > > I separate smtp and submission, and prevent using my domain through > smtp. However somehow someones's PC gets compromised and sends mail > modifying the From header in the data section. > > Even if the envelope-from is not forged (using > reject_sender_login_mismatch and so), email clients often display only > the descriptive From. > > Is there a way to prevent this forging of descriptive From using > postfix itself? > > Best regards, Hugo > >
Add this line to main.cf : smtpd_sender_login_maps = hash:/usr/local/etc/postfix/smtpd_sender_login_maps And then add to smtpd_sender_login_maps : u...@example.com u...@example.com
