Simple setup for sending mail from outlook express with proxy server setup

If you want to setup your own proxy server and mail relay server.Here I give you basic setup to send mail using outlook express ,configure squid first  http://arun-itadmin.blogspot.com/search/label/squid 

http://ftp.sanguine.net/pub/postfix/official/2.5/RPMS-rhel5-i386/ go to this site and download  your postfix version and install.

configuration  /etc/postfix/main.cf:  Add or modify this parameters.

inet_interfaces = all
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
home_mailbox = Maildir/
mydomain=[your domainname]
# if it comes under C class network.Add all your sites subnet details here.
mynetworks=192.168.28.0/24,192.168.27.0/24 

then start postfix 
#postfix start 

Configuration outlook express :

Proxy server IP :192.168.3.8
configure internet accounts in outlook express :
servers

 incoming mail server   192.168.3.8
 outgoing mail server    192.168.3.8

outgoing mail server 
check -  my server required authentication

Leave all other parametes to its default values.

Now you can send mail from outlook express thro postfix.