I hava a mixed mode exchange organization (5.5 and 2000). There is one IMC in na 5.5 server, and two SMTP connectors in a exchange 2K cluster. The problem is there´s lots of messages coming from internet through a connector to one of my 2K virtual servers in the cluster, and the X.400 queues to the exchange 5.5 servers are getting very big. When I restart the MTA in the 2K virtual server, the messages flow, but in little time, the queue is big again. Do you know what could be the problem? Danilo Dias Departamento de Informática Consultoria de Segurança da Informação Analista