first of u need to install all sendmail packages or rpm's.

Steps for configure sendmail server for local lan.

#vim /etc/mail/sendmail.mc

line no.116
make it look like this

dnl # DAEMON_OPTIONS ('Port=smtp.addr=127.0.0.1,name=MTA)dnl
i am just add "dnl #" at starting of this line.

now save and exit

#vim /etc/dovecot.conf
line no 17 remove '#' for open this line protocols = imap imaps pop3 pop3s

save and exit

#m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf

now save and exit

#vim /etc/hosts
remove all lines form it and then add these lines

youripaddress fqdn hostname
like 192.168.0.1 pc1.san.com pc1

save and exit

#service sendmail restart
#service dovecot restart


send test mail to
#mail root@fqdn of your server

Thanks

sandeep plz solve my problem
http://www.linuxquestions.org/questi...uation-714525/