How to change email app. preference in DTPro?

Please try this

  • Select an email in DEVONthink
  • Choose Data > Show In Finder
  • Open the Info panel

What’s the default application for the file?

The default here was Mail.

Changed to Entourage and now all OK.

Not sure why this worked or did not work I suppose previously but I am happy with the results.

Thanks for the work and quick follow-up.