Question

I am having an application build using j2me lwuit.
I need to send e-mail from that app.

Answer 1

To make your application smaller, I’d suggest to implement SMPT over a SocketConnection. For small e-mails this shall be pretty straightforward:

SocketConnection connection = (SocketConnection)Connector.open("socket://your.smtp.server:25");
DataInputStream is  = sc.openDataInputStream();
DataOutputStream os = sc.openDataOutputStream();
//now the SMTP chat with server

Using this approach may allow you to make your application to be depend only on MIDP/CLDC profiles, thus to be easier portable to other phones (at least in theory).