I like the icons in both 14 and 15, they are clever to express all three concepts of email, health and security. Green writing below is too hard to read I think. Black hMael in 14 seems a bit out of place,
We've had customer feedback that the padlock representation actually looks like either a handbag or briefcase. What can we do to make it seem more like a padlock rather than a bag?
I prefer the envelope style from #36, but grey writing is much better. As mentioned above, still have the problem that the envelope / lock looks like a bag.