SMTP AUTH for all users except for our mailing-lists ?

[Frank Bonnet]

Hello

I would like to force all my real users to use SMTP AUTH
( SASL + LDAP ) but we have many internal mailing lists
running and I wonder if it is possible to add an exception
for that purpose , I think it would be possible with "mynetwork"
statement but I would not screw up our production server and
need experts advices.

Thanks