migration fails on heroku due to activeadmin mailer
Try installing the Sendgrid addon:
heroku addons:add sendgrid:starterIf you are deploying to the Aspen or Bamboo stacks, it should work right away. If you are using the Cedar stack, you need to add an additional initializer:
#config/initializers/mail.rbActionMailer::Base.smtp_settings = { :address => 'smtp.sendgrid.net', :port => '587', :authentication => :plain, :user_name => ENV['SENDGRID_USERNAME'], :password => ENV['SENDGRID_PASSWORD'], :domain => 'heroku.com'}ActionMailer::Base.delivery_method = :smtpTaken from: http://devcenter.heroku.com/articles/sendgrid
This is confusing me a little:
Connection refused - connect(2)Do you have your mail setup? Are you using SendGrid or similar? Remember that Heroku don't provide email services directly.