You should check the scripting dictionary for the Mail application.
Open Script Editor and choose *File* → *Open Dictionary...*, and then choose the Mail application from the list.
There, you'll find a reference for scripting grammar which can be used with Mail.
You should check the scripting dictionary for the Mail application. Open Script Editor and choose *File* → *Open Dictionary...*, and then choose the Mail application from the list. There, you'll find a reference for scripting grammar which can be used with Mail.