Selectable User ID when sending email.

It would be beneficial for some of our users that operate a shared inbox but don't wish to send mail from the shared inbox on behalf of their own ID. For example when the shared email is for a different domain/company altogether.

It would be great if we could use location or even better a "From drop-down" to select which ID file to sign the email with. The current best solution is to either log into notes with a different id (which hinders productivity) or provide the user with web access to the shared email which causes segmented user experience which is not ideal either.