尝试设置IMAP（Javamail）

Basically i've written up a SMTP server in Java and it works great. I have a website which gets user input (From: , To: , Subject, Body) outputs it into a log file then Java reads that and sends the email. If someone tries replying, i want it to get forwarded to their personal email (gmail, yahoo, hotmail, etc...). Any idea on the best way of doing this?Basically i've written up a SMTP server in Java