Android - Receive notifications and launch POP3 email client from my app

Question

I'm creating a simple Android app and I wish to have an associated widget that displays new message notifications from my POP3 email client (configured on my device). Then when the user taps the widget, the app launches (even just to the inbox is fine).

1. Is this possible?
2. What is the intent for this?

I have read on other posts that its possible to do with the gmail app but haven't found any that directly state POP3 will work.

UPDATE As stated in comments I'm wondering if its possible to create my own "mail server" that will give me notifications and then when a user taps the button in my app it will just boot the set "default" mail client.

Can any one foresee issues with such a setup?