Parte do sistema de envio referente ao envio de email para fornecedor.

monomai.rb

 ...

 mail = Mail.new do
      self.content_transfer_encoding = 'quoted-printable'
      subject envio_mono.assunto
      from    hdr.sender
      to      envio_mono.mail

      html_part do
        self.content_transfer_encoding = 'quoted-printable'
        content_type "text/html; charset=#{Encoding.default_internal.to_s}"
        body premailer.to_inline_css
      end
      encoding = Mail::Encodings::Base64

      data = Premailer.new(File.read_recode(html_file), warn_level: Premailer::Warnings::SAFE, with_html_string: true).to_inline_css
      grava_para_analise(data, 'htmlrecode') # salva em disco para verificarmos a existencia de caracteres estranhos
      self.attachments['Para Imprimir.html']= { :data=> encoding.encode(data), :encoding => encoding::NAME }
  end
  
  message = mail.to_s
  
  unique_id = transmission_request.unique_id
  xsmtplw   = "x-smtplw: #{unique_id}"
  replyto   = "Reply-To: <#{original_sender_address}>"
  message   = [xsmtplw, replyto, message].join("\r\n")
    
  result = Net::SMTP.start('smtplw.com.br', 587, sender_domain, user, pass, :login) do |smtp|
    smtp.send_message message, sender, [recipient]
  end