Service for SparkMail

[tommyweir]

You might find my workaround for this issue useful.

Select the preferred Mail app

A workaround! Okay, you can set the ‘Open With’ preference for an email message in the Finder with the good ole Info panel. drag an email to the desktop say. Cmd+i to get the info panel, choose the Open With popup Choose Mailmate (and I presume Spark or Outlook depending on what you have) Hit the Change All button and confirm. And now dragged emails in Agenda, when double-clicked, will launch correctly in your preferred email app.