Use mail_view (https://github.com/basecamp/mail_view) from Basecamp to test your Spree e-mails.
Add mail_view and spree_mail_view to your Gemfile:
group :development do
gem 'spree_mail_view', :github => 'reinaris/spree_mail_view'
end
run bundle.
After that, visit: http://localhost/mail_view
You can test the following e-mails in your browser without resending them (just hit refresh):
- Order confirm email
- Order cancel email
- Shipment shipped email
- Forgot password email