[Pkg-exim4-users] How validate Exim user and password vs sender

[Michael González Medina]

Hi all list members:

  I was wondering if it's posible(I think yes, but I don't know how... 
yet.. ;-) ) to validate, user and password VS sender..??

Why...?

Because every time that a user authenticate in my mail server in order 
to send a message, I don't know how Exim prevent that user from use 
another [mail from] address(off course.... that another address have to 
be real in my server, due to sender verification is working fine so... 
no real senders are rejected..).


thank's in advance,

PD: Sorry for my bad English.

-- 
Michael González Medina
Administrador de Red
Centro Nacional de Sanidad Vegetal