# #27 Gem Letter Opener - best way to preview emails in development

- URL: https://superails.com/posts/ruby-on-rails-27-gem-letter-opener-best-way-to-preview-emails-in-development
- Published: 2021-05-19
- Duration: 04:41
- Access: free
- Playlists: Action Mailer

gem letter_opener:
https://github.com/ryanb/letter_opener
Source Code for the Episode:
https://github.com/corsego/26-action-mailer/commit/24fb10065fb5c4502b15ea75d651aec8e61413e0

To fix Launchy error - run these commands in console:
export BROWSER=/dev/null
export LAUNCHY_DRY_RUN=true