Action Mailbox saying "Missing required Mailgun API key" even though key is present

Question

I have Mailgun set up to forward emails to my /rails/action_mailbox/mailgun/inbound_emails/mime endpoint.

When my endpoint receives the request, it gives the following error:

ArgumentError (Missing required Mailgun API key. Set action_mailbox.mailgun_api_key in your application's encrypted credentials or provide the MAILGUN_INGRESS_API_KEY environment variable.)

However, MAILGUN_INGRESS_API_KEY is in fact set. When I run ENV["MAILGUN_INGRESS_API_KEY"] in the console, I see my API key. I even pasted in the API key determination code from GitHub to see if there was a problem there, but the return value I got was my actual API key.

Any ideas on what the problem could be?

Answer 1

Just checking few things to see if can rectify, as I understand you know much better than me about rails.

• Do you have setup mailgun api_key in environment configuration like for development config/environments/development.rb

config.action_mailer.delivery_method = :mailgun
  config.action_mailer.mailgun_settings = {
    api_key: ENV['MAILGUN_INGRESS_API_KEY'],
    domain: 'your_domain.com',
    # api_host: 'api.eu.mailgun.net'  # Uncomment this line for EU region domains
  }

Now let us do one test, visit (bin.mailgun.net) and get paste bin url then run rails c

mg_client = Mailgun::Client.new(ENV["MAILGUN_INGRESS_API_KEY"], "bin.mailgun.net", "aecf68de_you_got_visiting_site", ssl = false)
message_params = {  from: 'bob@sending_domain.com',
                    to: '[email protected]',
                    subject: 'The Ruby SDK is awesome!',
                    text: 'It is really easy to send a message!'
                  }
result = mg_client.send_message("your_sending_setup_on_mailgun_domain.com", message_params)

puts result.inspect

See what message came and you may get idea. There could be environment configuration issue also for development you have to setup different then for production. Also check on paste-bin does it got any hit.