I have a CentOS server configured with sendmail and none of my messages seem to be sent.
I am looking at the maillog fiel and see this error "Jul 16 13:38:43 fmsubbnix sendmail: n6GHcgRE001026: n6GHchRE001140: DSN: Host unknown (Name server: outgoing.earthlink.net: host not found)"
My guess is the the parameter "Name server: outgoing.earthlink.net" is incorrectly configured. I probably need to use the company's smtp relay server. Where is this value located?