> > Stop your users from using false addresses
>
> To hide what they are doing, SPAMers frequently set the sender address
> to point at a duff address. For sites using MUAs which submit email
> over SMTP, you can avoid your users using an address other than a
> valid address within your domain by restricting permitted sender
> addresses.
>
> sender_address_relay = cl.cam.ac.uk
>
> Doesn't sender_verify cover this?
I'm new to all this stuff, but ph10 has been looking over my shoulder ...
"sender_verify" means "check that the sender address supplied is *A* valid
address (so that any bounce messages can be sent OK)".
"sender_address_relay = cl.cam.ac.uk" ensures that outgoing mail has to have a
sender address of the form $user@???, thereby stopping *MY* users
from
sending email with a sender address of neal@???, which would
otherwise be permitted.
Have I missed something ?
