Using Cloud9 IDE and Mailgun getting this error Net::SMTPSyntaxError in Devise::RegistrationsController#create

Question

Trying to set up Mailgun for RoR4.2 app development environment but still getting the above error. As I understood from this answer there is problem with config development file.

This is my config/environments/development.rb:

 config.action_mailer.raise_delivery_errors = true
 config.action_mailer.perform_deliveries = true

 host = 'my_app.c9.io'
 config.action_mailer.default_url_options = { host: host }

 config.action_mailer.delivery_method = :smtp
 config.action_mailer.smtp_settings = {
 address: 'smtp.mailgun.org',
 port: '2525',
 domain:     ENV["MAILGUN_DOMAIN"],
 user_name:  ENV["MAILGUN_USERNAME"],
 password:   ENV["MAILGUN_PASSWORD"],
 authentication: :plain,
 enable_starttls_auto: true,
 }

As suggested here I also checked environment variables in console, they are properly set. I'm using port 2525 as suggested here and here. Any ideas what can be wrong?

Answer 1

So I finally get the answer, for whatever reason Cloud9 don't accept environment variables here so I had to hardcode them and had to use "hashrocket" format:

config.action_mailer.raise_delivery_errors = true
config.action_mailer.perform_deliveries = true

host = 'my_app.c9.io'
config.action_mailer.default_url_options = { host: host }

config.action_mailer.delivery_method = :smtp
config.action_mailer.smtp_settings = {
:address        => 'smtp.mailgun.org',
:port           => '2525',
:authentication => :plain,
:user_name      => '[email protected]',
:password       => 'xxxxxxxxxxxxxxxxxxx',
:domain         => 'sandboxxxxxxxxxxxxxxxxxx.mailgun.org',
:enable_starttls_auto => true  
}

If anybody knows how to use environment variables in Cloud9 config development file please comment here.