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我正在使用 Rails 发送电子邮件，如下所示：

attachments["ticket.pdf"] = WickedPdf.new.pdf_from_string(render_to_body(pdf: "ticket", template: 'template' }))

这在 Gmail 中运行良好，但在其他几个客户端中，附加的 pdf 只是没有出现。

查看源代码，我意识到这是 mimeparts 的问题。

我很难在雅虎和其他几个电子邮件客户端（如 Thunderbird）中显示附件文件，如果我分析发送的电子邮件的源代码，我会发现：文件的每个部分的 mimepart 都是相同的。 .层次结构（据我所知）必须是这样的：

multipart/mixed
multipart/alternative
multipart/related
text/html
image/png (e.g. for an inline attachment; pdf would be another good example)
text/plain
application/zip (e.g for an attachment--not inline)

这是我从https://github.com/jcoleman/mail_alternatives_with_attachments中提取的

这是电子邮件来源（只是部分内容以便更好地理解）：

Delivered-To: someone@yahoo.com
Received: by 10.194.54.135 with SMTP id j7csp144091wjp;
        Fri, 28 Sep 2012 10:55:03 -0700 (PDT)
Received: by 10.224.187.146 with SMTP id cw18mr18768052qab.35.1348854902751;
        Fri, 28 Sep 2012 10:55:02 -0700 (PDT)
Return-Path: <somewhare@company.com>
Received: from mail-qa0-f46.company.com (mail-qa0-f46.company.com [209.85.216.46])
        by mx.company.com with ESMTPS id c6si13006455qao.34.2012.09.28.10.55.02
        (version=TLSv1/SSLv3 cipher=OTHER);
        Fri, 28 Sep 2012 10:55:02 -0700 (PDT)
Received-SPF: pass (company.com: domain of somewhere@company.com designates 209.85.216.46 as permitted sender) client-ip=xx.xxx.xxx.xxx;
Authentication-Results: mx.company.com; spf=pass (company.com: domain of somwhere@company.com designates 209.85.216.46 as permitted sender) smtp.mail=somewhere@company.com; dkim=pass header.i=@company.com
Received: by mail-qa0-f46.company.com with SMTP id c26so105866qad.5
        for <someone@company.com>; Fri, 28 Sep 2012 10:55:02 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=company.com; s=20120113;
        h=date:from:reply-to:to:message-id:subject:mime-version:content-type
         :content-transfer-encoding;
        bh=nETVpMomUq0PkrNf9ScGjdaBPc5tYF0m1Rphx5FNS4c=;
        b=I1ICSRRK10cdrqXxkNWmK5cLvXOqFpxXmzxNMlIVa8jh+4U1GwqwI1GZF7BRXh5FAU
         wCyTzXfSkBrmn2cVGwUUiNEh956KT2ssWx37cQIb915lSp6rdIqflgQcF9yKwmtJoxDL
         qO+nEVse7+Azi828zC7D6VV7ebAbmnr006KmppkH9bxILk+syiPKLvp4rZXAMIp0IFW8
         nYZ2jY+n/ryduTSl0qDaBDCzVrky2eNwpqfJYizoYWIhxFuDmUWwaPpKzfWoxzT4b0+P
         Mp/Ugv6iN1QyETJWbOfX4lpGezFzcaV7reZaBXLzcqUe1dc8elxFfWncsE0vozmFaj8m
         z37Q==
Received: by 10.224.58.134 with SMTP id g6mr18690371qah.40.1348854902269;
        Fri, 28 Sep 2012 10:55:02 -0700 (PDT)
Return-Path: <somwhere@company.com>
Received: from localhost.localdomain (company.com. [xx.xxx.xxx.xx])
        by mx.company.com with ESMTPS id ck11sm13357478qab.17.2012.09.28.10.54.56
        (version=TLSv1/SSLv3 cipher=OTHER);
        Fri, 28 Sep 2012 10:55:00 -0700 (PDT)
Return-Path: <bounces1@somewhere.com>
Date: Fri, 28 Sep 2012 15:09:56 -0300
From: somewhere <somewhere@company.com>
Reply-To: someone@company.com
To: someone@company.com
Message-ID: <5065e7f4b41bf_a9e43fdbdd45a7601574c@megara.local.mail>
Subject: algun subject
Mime-Version: 1.0
Content-Type: multipart/alternative;
 boundary="--==_mimepart_5065e7f4af345_a9e43fdbdd45a760153b9";
 charset=UTF-8
Content-Transfer-Encoding: 7bit


----==_mimepart_5065e7f4af345_a9e43fdbdd45a760153b9
Date: Fri, 28 Sep 2012 15:09:56 -0300
Mime-Version: 1.0
Content-Type: text/plain;
 charset=UTF-8
Content-Transfer-Encoding: quoted-printable
Content-ID: <5065e7f4b0ead_a9e43fdbdd45a7601546@megara.local.mail>

********
texto cualquiera
********



----==_mimepart_5065e7f4af345_a9e43fdbdd45a760153b9
Date: Fri, 28 Sep 2012 15:09:56 -0300
Mime-Version: 1.0
Content-Type: text/html;
 charset=UTF-8
Content-Transfer-Encoding: quoted-printable
Content-ID: <5065e7f4b1d7d_a9e43fdbdd45a76015576@megara.local.mail>

<html xmlns=3D'http://www.w3.org/1999/xhtml'>
  <html xml:lang=3D'en' xmlns=3D'http://www.w3.org/1999/xhtml'>
    <head>
      <meta content=3D'text/html; charset=3Dutf-8' http-equiv=3D'Content-=
Type'>
      <title>somewhere</title>
      <link href=3D'/assets/ev_classic_mailer.css' rel=3D'stylesheet' typ=
e=3D'text/css'>
      <link href=3D'/assets/mailer_colors.css' rel=3D'stylesheet' type=3D=
'text/css'>
    </head>
    <body>
      <table class=3D'mail-container-table'>
        <tr>
          <td class=3D'decoration' colspan=3D'3'></td>
        </tr>
        <tr>
          <th background=3D'https://here.company.com/ass=
ets/mail/ev_classic_hd.png' class=3D'bcolor12 border header-01' colspan=3D=
'3'>
            <h1>cogotudo</h1>
          </th>
        </tr>
      </table>
    </body>
  </html>
</html>

----==_mimepart_5065e7f4af345_a9e43fdbdd45a760153b9
Date: Fri, 28 Sep 2012 15:09:56 -0300
Mime-Version: 1.0
Content-Type: text/html;
 charset=UTF-8
Content-Transfer-Encoding: quoted-printable
Content-ID: <5065e7f4b2ede_a9e43fdbdd45a76015666@megara.local.mail>

<html xmlns=3D"http://www.w3.org/1999/xhtml" style=3D"outline: 0; font-we=
ight: inherit; font-style: inherit; font-size: 100%; font-family: inherit=
; vertical-align: baseline; margin: 0; padding: 0; border: 0;">
  <html xml:lang=3D"en" xmlns=3D"http://www.w3.org/1999/xhtml" style=3D"o=
utline: 0; font-weight: inherit; font-style: inherit; font-size: 100%; fo=
nt-family: inherit; vertical-align: baseline; margin: 0; padding: 0; bord=
er: 0;">
    <head>
      <meta content=3D'text/html; charset=3Dutf-8' http-equiv=3D'Content-=
Type'>
      <title>somewhere</title>
      <link href=3D'/assets/ev_classic_mailer.css' rel=3D'stylesheet' typ=
e=3D'text/css'>
      <link href=3D'/assets/mailer_colors.css' rel=3D'stylesheet' type=3D=
'text/css'>
    </head>
    <body style=3D"outline: 0; font-weight: inherit; font-style: inherit;=
</body>
  </html>
</html>


----==_mimepart_5065e7f4af345_a9e43fdbdd45a760153b9
Date: Fri, 28 Sep 2012 15:09:56 -0300
Mime-Version: 1.0
Content-Type: application/pdf;
 charset=UTF-8;
 filename=ticket.pdf
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
 filename=ticket.pdf
Content-ID: <5065e7f43b81b_a9e43fdbdd45a760150c9@megara.local.mail>
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----==_mimepart_5065e7f4af345_a9e43fdbdd45a760153b9--
4

1 回答 1

0

您所有的 mimepart 边界都是相同的……它们都是“替代”边界。

--==_mimepart_5065e7f4af345_a9e43fdbdd45a760153b9

对于包含 HTML、纯文本和附件的电子邮件，您需要通过将边界正确放置在正确的位置来声明并正确封装单独的部分。了解其外观的最简单方法是在电子邮件客户端中手动创建一封电子邮件，其中包含您想要的所有“功能”（HTML + 纯文本 + 附件），然后查看源代码并记下 mimepart边界被划定。

电子邮件源的每个“部分”实际上都声明了边界的样子，然后在每个部分的末尾有一条或多条边界线表示该部分的结束。部件可以而且应该封装在其他部件中。这该死的复杂，但带回家的注意事项是，在您的示例中，您只有一个 mimepart 声明并在您应该拥有更多时使用（正如您在层次结构中指出的那样）。

现在至于哪里/什么时候出了差错，我们必须查看您用于从头到尾生成电子邮件的代码。

于 2013-11-10T04:06:02.957 回答