installing dns, sendmail and gcc

installing dns, sendmail and gcc

Post by sulia.. » Thu, 27 Aug 1998 04:00:00

    My server having problem sending out mails. Nothing wrong receiving
and problems with sending. It gives this error:

421 Host not found for mailer ddn.

550 Postmaster... User unknown

I'm using a 5.x sendmail version. and also from the messages log file I
keep receiving lame server errors. What could have gone wrong there
any patches that I can install for the mean time.

Also I need some guide in installing the sendmail, gcc and dns. I
rreally appreciate if you could help .