Hi, I have Exchange 5.5 service Pack 4 and Exchange 2000 Service Pack 3 Coexistence, both are installed over Windows 2000 Server Service Pack 3 Member Servers for the same Domain 123.com.ec There are two DNS servers: Linux is the primary DNS Server and Windows 2000 SP3 is the secondary. The DNS Zones for te public DNS domain is was created in Standard Primary Zone on Linux and replicated to Standard Secondary Zone on Windows 2000. I moved 800 mailboxes from Exchange 5.5 to Exchange 2000 satisfactorily. Every was working fine, then the cost for the Internet Mail Service in Exchange 5.5 was increased to 10 and the cost for the SMTP Connector in Exchange 2000 leave as default (1) for the SMTP=* Address Space. Later the Queue in the SMTP Virtual Server was increased, the SMTP Virtual Server not recognize the 123.com as local domain. The recipient policy had the 123.com as a local domain. A message between Exchange 2000 mailboxes arrive 1 hour later and the Queue reports 2100 message. What does it happen? Any help will be valuable Víctor Hugo Naranjo Borja Consultor SYNERGY Telf: (593)+4+2280303, +2290341, +2290469 Ext: 104 Fax: (593)+4+2280412 Víctor Hugo Naranjo Borja Consultor SYNERGY Telf: (593)+4+2280303, +2290341, +2290469 Ext: 104 Fax: (593)+4+2280412