OK, stephen stair ( the great) released a new version of dswifi with TCP! I immediately started working on including it into NDSMail. After hours of sweat and hard work ;) I finally managed to connect to a POP3 server and receive the subject lines. Some more work to make it more stable, then I plan to release a test version in the next days !
If anyone is interested, I can post some screenshots of NDSMail running in Dualis (of course without any connectivity) or I can try to take some pictures with my crappy handy-cam :)