Hello, I've googled around and been playing with relay_recipient_maps. I have it as follows: relay_recipient_maps = hash:/etc/postfix/LDAPaddressbook.txt ldap:/etc/postfix/ldap-users.cf
Where /etc/postfix/LDAPaddressbook.txt is a local list of the valid mailboxes, and ldap:/etc/postfix/ldap-users.cf contains information to query the LDAP server for the list of valid email boxes. The postfix works as a relay/antispam server. The question: If there is a mail to be delivered to a nonexistent mailbox, is it normal to see postfix asking via SMTP (after LDAP) to the next-hop in /etc/postfix/transport? -- Nicolás Velásquez O. Genève, Suisse Mobile +41.797976460