emails/lib/tasks/email.rake
namespace :email do
desc 'Sends test email to specified address - Example: EMAIL=spree@example.com bundle exec rake email:test'
task test: :environment do
unless ENV['EMAIL'].present?
raise ArgumentError, 'Must pass EMAIL environment variable. ' \
'Example: EMAIL=spree@example.com bundle exec rake email:test'
end
Spree::TestMailer.test_email(ENV['EMAIL']).deliver_now
end
end