Stick, what use would have a rock?
How the heck did you trace the problem down to the amount of groups the user was in?
Might wanna take a look into strato.de, although I don’t know whether it would be available for you.
E: don’t even know if there’s an English variant of the website
The hard part is getting used to it. How do I share my public keys? How do I use GPG (the program)? How do I access them easily? What do I do when I want to encrypt my mails on desktop (maybe Windows+Linux), laptop, and phone? It’s just relatively much work to gather the knowledge.
+ the fact there’re not many people using it
It absolutely is. Had a great time with my girlfriend, who normally doesn’t play at all.