Problemas con el smtp

[tecnico002]

El smtp no funciona y la falla mostrada en /var/log/exin_mainlog es la siguiente:

2006-12-19 00:17:06 SMTP connection from "user" closed after SIGTERM
2006-12-19 00:17:06 1 SMTP connection from host"Numero_ip"."dominio.com" ["Numero_ip"] closed after SIGTERM
2006-12-19 00:17:06 1 SMTP connection from host"Numero_ip"."dominio.com" ["Numero_ip"] closed after SIGTERM
2006-12-19 00:17:06 1 SMTP connection from host"Numero_ip"."dominio.com" ["Numero_ip"] closed after SIGTERM
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Por favor algun procedimiento para solucionar la falla....