docbrown/app/mailers/devise_mailer.rb

class DeviseMailer < Devise::Mailer
  default reply_to: proc { ForemInstance.reply_to_email_address }

  include Deliverable

  before_action :use_settings_general_values

  def use_settings_general_values
    Devise.mailer_sender =
      "#{Settings::Community.community_name} <#{ForemInstance.from_email_address}>"
    ActionMailer::Base.default_url_options[:host] = Settings::General.app_domain
  end

  # rubocop:disable Style/OptionHash
  def invitation_instructions(record, token, opts = {})
    @message = opts[:custom_invite_message]
    @footnote = opts[:custom_invite_footnote]
    headers = { subject: opts[:custom_invite_subject].presence || "Invitation Instructions" }
    super(record, token, opts.merge(headers))
  end
  # rubocop:enable Style/OptionHash
end