#1 Key selection based on account email address

[Chris Smith]

I have a number of keypairs in my keyring for different email
accounts and uses. When I signed a message, it just chose the
default key, which is not the correct one for the account I use with
Entourage. It would be nice if:

- I could select (in options) which key to use for signing

- The script would choose the signing key based on the email
address of the account sending the email.