Windows Mobile Professional

Can anyone recommend some software which would let me get send/receive pop3 emails on my mobile phones? I have a HTC Tytn and a Nokia E61
I would like to trial a couple of apps (1 on each phone).

I will probably download a trial of always-on mail from www.workoutofoffice.com/software/internet_edi tion, but would still like a second app to trial.
Additionally, Ive never heard of always on mail, so if anyone has any experience of using it or any good/bad feedback please let me know.

Thanks
alison