If the computer is connected to the internet perminantly that hosts the mail server, make sure you secure the relap server (this is try for any mail server) as you will become an open relay very quickly if you dont.
the easiest way to do this (assuming you do not need to be able to send messages from outside your network, is to disable port 25 (SMTP port) from being accessed from outside your network. Otherwise use the built in security features.
i am a student of diploma in electronics and telecomm
can anyone suggest me projects related to the below domains:-
electrical and electronics