My company, Greenview Data, provides a hosted email encryption solution that would cover your lawyer friend perfectly. It allows you to encrypt emails with atta

My company, Greenview Data, provides a hosted email encryption solution that would cover your lawyer friend perfectly. It allows you to encrypt emails with attachments up to 50mb that the client then accesses through a secure web portal which they create a username/password for, so there's no need for your friend to manage any keys or certificates. Clients can also reply to emails through the portal, keeping all communication encrypted. There are even special scanning algorithms specifically for legal professionals (and health, finance, government, etc.) that will automatically encrypt emails with sensitive data even if your friend forgets to do it herself. It's all designed to make encrypted email as simple as regular email so nobody has to worry about it. Check it out at www.greenviewdata.com/encryption.