Martin Cygan  postet an interested link today. It is a comparison of features of the different ActiveSync clients with different protocol versions.

http://en.wikipedia.org/wiki/Comparison_of_Exchange_ActiveSync_Clients

via Vergleich aller Microsoft Exchange ActiveSync Clients | Martin Cygan

With last update vor Lotus Traveler 8.5.2.2 there came a new feature for Android devices. You can read and send encrypted mails and you can sign mails with your notes id.

You can click on details in new mails, there you find the new checkboxes for encrypt or sign.

Long needed feature and it works better than Lotus Companion App on iPhone, because the id password is cached for a short time.

Update

After some testing i wrote down some points on this new feature.