Le 05/11/2010 22:26, Alfonso Alejandro Reyes Jimenez a écrit :
But that would be spoofing not relay right?
Relay is when you let other users send emails to any other domain
claiming be someone in your organization.
no there's no claim.
open relay is when someone uses your server to send mail to people
outside of your organisation. it doesn't matter who they claim to be.
they can tell the truth. the thing is: it is unauthorized relay.
a long time ago, "open relay" was a natural thing ("collaboration").
unfortunately, spammers/abusers have killed this collaboration.
Spoofing is when you pretend to be someone you are not, right now I
cant remember how to prevent this kind of attacks but you may search
google (that’s how I fixed it).
the first question to ask yourself is: why would you care? in most
cases, the recipient can take care of that.
