You are a student of Computer science and Engineering but to see this post, I think that you are not familiar with reading. You and the students of Daffodil International University use @diu.edu.bd email address format. But the interesting thing is that this service is powered by Google as like as Gmail.
GOOGLE Application provides anyone to use their 'MX record'. An MX (mail exchanger) entry tells a client which server receives mail sent to a domain name. So we are using Google Application's service.
So just go to your email inbox and there exist an settings tab from there you can check your POP/IMAP settings. It is just as like as Gmail. Just use your username in your Email Client Software (outlook.. etc..) as firstname.lastname@example.org
and The exact answer of Mr. Kazi Shahin is:
Pop: pop.gmail.com Port: 995
SMTP: smtp.gmail.com Port: 465
Just put it and save it for your DIU email server connection with your PC.