thorsten napsal(a): >> domain1.tld has: >> 20 server.domain2.tld >> 10 server.domain1.tld >> >> domain2.tld has: >> 20 server.domain1.tld >> 10 server.domain2.tld >> >> on server.domain1.tld we need to have: >> domain1.tld within virtual domains or local domain >> domain2.tld within transport >> >> on server.domain2.tld we need to have: >> domain2.tld within virtual domains or local domain >> domain1.tld within transport So what does return postmap -q domain2.tld mysql:/etc/postfix/sql/transport on server.domain1.tld? what does return postmap -q domain1.tld mysql:/etc/postfix/sql/transport on server.domain2.tld? I guess you should also really perform name resolution on both machines, as mentioned in one reply. I think that you should also correct transport_maps vs virtual_transport, both use the same sql statements, aka gets the very same values... I guess that's the issue. We use slightly different config: alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases command_directory = /usr/sbin config_directory = /etc/postfix content_filter = smtp-amavis:[127.0.0.1]:10024 daemon_directory = /usr/libexec/postfix debug_peer_level = 2 html_directory = no inet_interfaces = all mail_owner = postfix mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man mydestination = $myhostname, localhost.$mydomain, localhost mynetworks = 127.0.0.0/8, 193.165.161.232/29, 194.212.173.165 newaliases_path = /usr/bin/newaliases.postfix queue_directory = /var/spool/postfix readme_directory = /usr/share/doc/postfix-2.2.10/README_FILES relay_domains = mysql:/etc/postfix/mysql_virtual_transport_maps.cf sample_directory = /usr/share/doc/postfix-2.2.10/samples sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop transport_maps = mysql:/etc/postfix/mysql_virtual_transport_maps.cf unknown_local_recipient_reject_code = 550 virtual_alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf virtual_gid_maps = static:1001 virtual_mailbox_base = /pudu/mails virtual_mailbox_domains = mysql:/etc/postfix/mysql_virtual_domains_maps.cf virtual_mailbox_limit = 51200000 virtual_mailbox_maps = mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf virtual_minimum_uid = 1001 virtual_transport = virtual virtual_uid_maps = static:1001 Regards, David