On Jun 18, 2004, at 4:01 AM, Philippe Couas wrote: > How can i verify with POSTFIX, valid sender of mail ? > Could i verify that sender user has a mailbox or is an an alias ? smtpd_client_restrictions smtpd_sender_restrictions http://www.postfix.org/documentation.html -- Jason Dixon, RHCE DixonGroup Consulting http://www.dixongroup.net