Rails Action Mailer Configuration for MuuMuuMail (https://muumuu-mail.com/)

production.rb

config.action_mailer.delivery_method = :smtp
config.action_mailer.smtp_settings = {
  address:        'smtp.muumuu-mail.com',
  port:           465,
  domain:         '<Your Domain>',
  user_name:      '<Mail Account>',
  password:       '<Password>',
  authentication: :plain,
  ssl:            true,
  tls:            true
}