I like the design and the 2.0 feel. The reflection is a nice touch and the purple color is vivid, but not over the top. I took a look at your other logo submissions on your profile and really like your use of graphics and arrangement. Perhaps you could try something similar with the shazzlemail logo. Also, one of our requests is that the logo have the ability to represent each of our different products. I'm interested in what you have to show for ShazzleShare, our IM client that allows you to exchange files instantly.
The logos that we didn't like were a bit too busy and the lock was too overpowering. We really like the first design you submitted b/c it showcased a key feature of our technology... a "locked" envelope. The dots above shazzle are interesting... they kind of show how our technology transfers data, but it doesn't seem to fit with the rest of the logo. The lock on the M is confusing b/c we can't really tell what it is right away... you have to look to see that it's an M before it makes sense. The first submission is still the one we like the most.
The designs we weren't interested in were done so because the M was a little difficult to make out. Also, we want to see things that are more clever than a lock. That's why we liked the first M so much. It also highlighted the fact that our messages are secure, not that we provide security.
I also like the arc of circles, but it doesn't seem to fit with the M. Maybe you could rearrange it or try to incorporate it in a different way. Keep your ideas coming! Everything has been great so far, but each time you submit we're better guided down our path.