Am I missing something or do you lose all ability to "Share" via email if your email client is anything other than Apple's Mail.app?
Example:
You set your default email client to Mail.app - you right click on a file in Finder and select the Share option - Email is one of your choices.
You set your default email client to Thunderbird - you right click on a file in Finder and select the Share option - Email is no longer one of your choices.
Example:
You set your default email client to Mail.app - you right click on a file in Finder and select the Share option - Email is one of your choices.
You set your default email client to Thunderbird - you right click on a file in Finder and select the Share option - Email is no longer one of your choices.