i try to send e-mail but the following error appear :-
firstname.lastname@example.org... User unknown
/dead.letter... Saved message in /dead.letter
how i can solve this error ????
Well, I found a similar problem on Unix.com forums, where someone was also receiving the dead.letter issue. Have you configured sendmail? If not, in the configuration file /etc/sendmail.cf, the line with DS must be modified and you must specified your mail server. You can add this server in the file /etc/host.
After the modification of your sendmail configuration, you restart the service :
refresh -s sendmail
stopsrc -s sendmail
startsrc -s sendmail -a "-bd"