Dec 15, 2023: Information about macOS Sonoma 14.2 Mail Extension. Learn More

Support – Letter Opener for macOS

All the topics, resources, and contact options you need for Letter Opener.

Basics

Getting Started

How to get Letter Opener for macOS and how to use it.

Purchase Information

Find and manage in-app purchases.

Setting up Letter Opener

Change your Letter Opener preferences.

Troubleshoot Topics

Double-clicking doesn’t open the file in Letter Opener

Set Letter Opener as standard app to open a file-type.

No attachments are shown

The opened winmail.dat file only shows text and no attachments.

Letter Opener can’t open a file

Contact us if a problem with opening files persists.

The application can’t be opened because it may be damaged or incomplete.

How to repair a damaged application

Invalid license code

There might be two different apps installed.

Contact support

Please note that we can only answer support requests in English language.

support@winmail.help

Or use our contact form.