Heroku/devise - Missing host to link to! Please provide :host parameter or set default_url_options[:host]

Question

I am trying to push my app on heroku. I am still in dev. I use devise with the confirmable module.

When I try to add a user with the heroku console I got this error:<

Answer 1

The working one after so many research,

1. Don't forget to add default from: mail address in your ApplicationMailer (application_mailer.rb) as,

   class ApplicationMailer < ActionMailer::Base
     default from: 'yourmail@gmail.com'
     layout 'mailer'
   end
   

2. Add the below configuration in your production.rb.

   config.action_mailer.default_url_options = 
     { :host => 'yourapp.herokuapp.com' }
   config.action_mailer.delivery_method = :smtp
   config.action_mailer.smtp_settings = {
     address:              'smtp.gmail.com',
     port:                 587,
     domain:               'heroku.com',
     user_name:            'yourmail@gmail.com',
     password:             'yourgmailpassword',
     authentication:       'login',
     enable_starttls_auto: true
   }
   

3. Enable IMAP from your Gmail settings in Forwarding IMAP/POP tab.

4. Allow less secure apps: ON from https://myaccount.google.com/lesssecureapps

You're now good to go. :)