>I'm not sure this is the problem you are seeing, but I believe that an "_" >character is illegal in a FQDN.
it's not a legal DNS character by default for many NS, so it should never be used, above all not domain names used in MX RDATA fields. Try putting: 200.162.114.135 mann-hummel.com.br 200.162.114.135 server_aplic.mann-hummel.com.br .. in /etc/hosts file of the IMGate machine. Len
