How to solve these Mail questions in linux pls help

[ashu.wifi]

Hi Guys,

I am an RHCE student today my teacher gave me questions i dont know how to solve them...we hasnt finished the course yet...

1.Configure POP3 email on your system according to these criteria:
{ User Naresh must be able to retrieve email from your machine using POP3 from within example.com
{ Clients within the mast.org domain should not have access to your POP3 service

2. Configure SMTP mail service according to the following requirements:
{ Your mail server should accept mail from remote hosts and localhost
{ User jetking must be able to receive mail from remote hosts
{ Mail delivered to susan should spool into the default mail spool for jetking, /var/spool/mail/jetking

3. Provide SSL-encapsulated IMAP access (IMAPS):
{ IMAPS must be available to brad from example.com
{ IMAPS must NOT be available to other networks or domains.
{ The SSL certi cate for the IMAPS server must be created as follows:
Use the defaults for Country, State, Locality, and Organization Name
Set Organizational Unit to GLS
Set Common Name to stationx.example.com
Set Email Address to root@st13.example.com.

I Hve an working primary and slave dns and sendmail installed i followed the instructions in my 253 book that didnt let me go anywhere...i couldn't do it successfully So iam expecting something step by step from you all Cool Experts... :-)...pls+pls help me i need it badly..

at least give me answer of 2. question please. step by step but if possible give answer of all :):confused:

Thanks