Update ActionMailer host on production

config/environments/production.rb

@@ -67,7 +67,7 @@ Rails.application.configure do
   # config.action_mailer.raise_delivery_errors = false
   config.action_mailer.raise_delivery_errors = true
   config.action_mailer.delivery_method = :smtp
-  host = 'https://frozen-plateau-78948.herokuapp.com/'
+  host = 'frozen-plateau-78948.herokuapp.com'
   config.action_mailer.default_url_options = { host: host }
   ActionMailer::Base.smtp_settings = {
     :address        => 'smtp.sendgrid.net',
@@ -77,7 +77,6 @@ Rails.application.configure do
     # :password       => ENV['SENDGRID_PASSWORD'],
     :user_name      => ENV['app97879387@heroku.com'],
     :password       => ENV['0h6rbntu4629'],
-
     :domain         => 'heroku.com',
     :enable_starttls_auto => true
   }