I'm verifying the sender email (mail from:) of mails sent from local users, not the recipient email (rcpt to:).
the mapping parameter used in this case it: *smtpd_sender_login_maps * My question still stands...* * On Fri, Aug 30, 2013 at 1:50 PM, Wietse Venema <wie...@porcupine.org> wrote: > Jean-S?bastien Nicaise: > > If a local user sends an email with an invalid email address (mailf > > from:inva...@example.com, for example), the ldap table lookup does not > > return anything, hence the mail is blocked. > > > > If a local user sends an email with a valid email (mail > > from:us...@example.com, for example), the ldap table lookup returns the > > user1's email, then relays the mail. > > > > This works well if the user's email is part of the configured domain (@ > > example.com). > > > > The problem is if a user specifies an email address that is not part of > the > > configured domain. If the user sends an email with a source address of > > inva...@test.net, for example, the ldap table lookup does not return > > anything, but the email is still relayed. > > > > How could change this behaviour and block this email? > > If you can arrange for a database with all the valid addresses on > the internet, then I can show you how to query it with Postfix. > > Wietse >
