Support – Letter Opener for macOS Mail
All the topics, resources, and contact options you need for Letter Opener.
How to install Letter Opener for macOS Mail and how it works.
Letter Opener in macOS Mail
How to activate Letter Opener in macOS Mail.
How to license Letter Opener for macOS Mail
Letter Opener banner
How to customise Letter Opener for macOS Mail
No attachments are shown
A file was converted but it only shows text and no attachments.
Winmail.dat file is not converted
Letter Opener doesn’t seem to be converting files.
Incompatible Plug-in disabled
Error message upon starting Mail
Can’t be opened because it was not downloaded from the App Store
“‘Install Letter Opener.pkg’ can’t be opened”
License code not working
The license code doesn't unlock the current version of Letter Opener
Uninstall Letter Opener
In a South Austrian accent: Aww! We’re sorry to see you go!