postal/config/initializers/smtp_extensions.rb

# frozen_string_literal: true

module Net
  class SMTP

    attr_accessor :source_address

    def secure_socket?
      return false unless @socket

      @socket.io.is_a?(OpenSSL::SSL::SSLSocket)
    end

    #
    # We had an issue where a message was sent to a server and was greylisted. It returned
    # a Net::SMTPUnknownError error. We then tried to send another message on the same
    # connection after running `rset` the next message didn't raise any exceptions because
    # net/smtp returns a '200 dummy reply code' and doesn't raise any exceptions.
    #
    def rset
      @error_occurred = false
      getok("RSET")
    end

    def rset_errors
      @error_occurred = false
    end

    private

    def tcp_socket(address, port)
      TCPSocket.open(address, port, source_address)
    end

    class Response

      def message
        @string
      end

    end

  end
end