Update: If you are using iPhoto 11, you can simply go to Preferences > “Email photos using”
iPhoto Email Fail
The Best Kitties; The Worst Email App
iPhoto 11 added an awful new built-in email service that replaces the previous functionality: when sending an email, it used to open the Mail application and attach the photos to a new email. Now, it uses a terribly designed built-in email functionality that ruins everything.
Here’s how to get Mail.app back in iPhoto
Open the Terminal application.
Enter the following in Terminal: defaults write com.apple.iPhoto EmailApp Mail
Restart iPhoto and you’re all set.
If you change your mind, and you want to revert to using iPhoto’s email client, enter this in the Terminal: defaults write com.apple.iPhoto EmailApp iPhoto
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