i read your reply.please mention the 7 modules

please mention the name of 7 modules.Already i m started and thanks for your opinion.if you have time please mention it.

i am selected a project entitled" SMTP mail server".i want to know about opinion that it is enough for 6 months?and i am concentrated to do for authentication,creating , deleting and posting the mail and security .if i want to do more what can i do further?