On Fri, Nov 30, 2018 at 10:17:47PM +0800, 殷啟聰 | Kai-Chung Yan wrote: > > There is a Gmail trick where you can add one send-as email and provide > > smtp.gmail.com credentials. > > > You might have to create an app password. > > > I think that this guide does something similar to what I did: > > > https://blog.alexlenail.me/i-want-to-send-emails-from-my-google-domains-email-through-gmail-992bb3eae4c9 > > Just got my DD account and got the trick working, thanks for the tips! > > However this worries me. During the setup there is no Debian involvement, and > that means anyone can do the same trick to pretend to own my Debian address. >
That is just how email works. With the help of a cooperating mail server (which is trivial to setup) anybody in the world can send mail with any from address that they wish. This problem is not unique to Debian. Regards, -Roberto -- Roberto C. Sánchez