sendmail
 

Hi.....I searched sendmail using "dpkg -l sendmail" on ubuntu 9.04 jaunty" & found, package not installed. I am trying to install sendmail using "aptitude install sendmail", but it is not installing & the process is showing as it is being installed even after 5 minutes. So can anybody please tell me how can I install sendmail by using CLI mode. Becuase none of the user account is able to send mail to our offcial mail ID, which is getting mails from other servers.

Maybe because it is unsupported, now it's up to 11..04.
Maybe you should upgrade or reinstall latest version.
Although there maybe someone here who can tell you how to install or get the older repos.
http://en.wikipedia.org/wiki/List_of_Ubuntu_releases

If you can't upgrade, have you still got/can you get a copy of the install media for that version?