Я отправляю тестовое письмо с помощью ActionMailer. Шаблон обрабатывается и почта доставляется нормально. Единственная проблема - mimepart, а другие данные заголовка отображаются Google в теле сообщения.

Вот код, который отправляет по почте ..

def testing

    mail(:to => "[email protected]",:subject => "html mailer", :content_type => "text/html") do |format|
          format.html { render 'testing' }
          format.text { render :text => "bing" }
    end
end

и вот письмо получено.

----==_mimepart_508fd46252b8c_8023fe595835ad0479a6 Date: Tue, 30 Oct 2012 18:51:38 +0530     
Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit
Content-ID: <508fd46254ea7_8023fe595835ad0480b8@Apoorv-Parijats-MacBook-Pro-2.local.mail> 
bing ----==_mimepart_508fd46252b8c_8023fe595835ad0479a6 Date: Tue, 30 Oct 2012 18:51:38 
+0530 Mime-Version: 1.0 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding:  
7bit Content-ID: <508fd46256465_8023fe595835ad04819c@Apoorv-Parijats-MacBook-Pro-
2.local.mail> Hi bing
column 1    column 2
----==_mimepart_508fd46252b8c_8023fe595835ad0479a6--

Выход консоли -

 Loading development environment (Rails 3.2.2)
 1.9.3-p125 :001 > RankMailer.testing.deliver
 I, [2012-10-30T18:51:38.331238 #2050]  INFO -- :   Rendered rank_mailer/testing.html.erb           
 (1.8ms)
 I, [2012-10-30T18:51:38.333117 #2050]  INFO -- :   Rendered text template (0.0ms)
 I, [2012-10-30T18:51:45.824962 #2050]  INFO -- : 
 Sent mail to [email protected] (7484ms)
 D, [2012-10-30T18:51:45.825125 #2050] DEBUG -- : Date: Tue, 30 Oct 2012 18:51:38 +0530
 From: [email protected]
 To: [email protected]
        Message-ID: <508fd462572ec_8023fe595835ad0482c0@Apoorv-Parijats-MacBook-Pro-2.local.mail>
    Subject: html mailer
    Mime-Version: 1.0
    Content-Type: text/html;
     charset=UTF-8
    Content-Transfer-Encoding: 7bit



    ----==_mimepart_508fd46252b8c_8023fe595835ad0479a6
    Date: Tue, 30 Oct 2012 18:51:38 +0530
    Mime-Version: 1.0
    Content-Type: text/plain;
     charset=UTF-8
    Content-Transfer-Encoding: 7bit
    Content-ID: <508fd46254ea7_8023fe595835ad0480b8@Apoorv-Parijats-MacBook-Pro-2.local.mail>

    bing

    ----==_mimepart_508fd46252b8c_8023fe595835ad0479a6
    Date: Tue, 30 Oct 2012 18:51:38 +0530
    Mime-Version: 1.0
    Content-Type: text/html;
     charset=UTF-8
    Content-Transfer-Encoding: 7bit
    Content-ID: <508fd46256465_8023fe595835ad04819c@Apoorv-Parijats-MacBook-Pro-2.local.mail>

    Hi bing

    <table style="border:1px solid red">
        <tr>
            <td>column 1</td>
            <td>column 2</td>
        </tr>
    </table>

    ----==_mimepart_508fd46252b8c_8023fe595835ad0479a6--

     => #<Mail::Message:70255316899740, Multipart: false, Headers: <Date: Tue, 30 Oct 2012 18:51:38 +0530>, <From: [email protected]>, <To: [email protected]>, <Message-ID: <508fd462572ec_8023fe595835ad0482c0@Apoorv-Parijats-MacBook-Pro-2.local.mail>>, <Subject: html mailer>, <Mime-Version: 1.0>, <Content-Type: text/html>, <Content-Transfer-Encoding: 7bit>>