I've wrote a pretty basic web server before (with the help of you java developers), and I'm interested in moving on to an email server (ie, SMTP and POP3).
I haven't had any luck finding online information. And my TCP/IP book doesn't have enough about SMTP and POP3 to build an email server.
Could someone help? I've built a basic SMTP client previously. However, an SMTP and POP3 SERVER is different. What methods are used to transfer the emails? What commands are sent to a POP3 server to request emails? What are the login sequences??
If any one can help. ie; any tutorials, good SMTP/POP3 references, then it would be MUCH appreciated.
Thanks in advance,
PS: I would have asked this question in the networking section, however, I feel that atleast some of you Java developers could help, and also help relate the protocol to Java.