邮件字符编码

Question

此邮件应如下所示

Subject: asd asd asd åäö åäö åäö
Content: asd asd asd åäö åäö åäö

但是在雷鸟上，它看起来像这样

Subject: asd asd asd åäö åäö åäö
Content: asd asd asd <weird question mark characters>

这是Thunderbird中查看的来源，它有什么问题吗？

Return-Path: <example@example.com>
X-Original-To: example@example.com
Delivered-To: example@example.com
Received: from example.com (example.com [130.237.161.15])
    by example.com (Postfix) with ESMTP id 68270C0A20
    for <example@example.com>; Fri, 11 Apr 2014 04:35:10 +0200 (CEST)
From: Example <example@example.com>
Message-ID: <118563174.68.1397183710419.JavaMail.tomcat7@thesis>
Subject: =?UTF-8?Q?Forum_post:_asd_a?=
 =?UTF-8?Q?sd_asd_=C3=A5=C3=A4=C3=B6_=C3=A5=C3=A4=C3=B6_=C3=A5=C3=A4=C3=B6?=
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: quoted-printable

asd asd asd =E5=E4=F6 =E5=E4=F6 =E5=E4=F6

Answer 1

您的内容类型表示UTF-8，但是主体实际上是iso8859-1或类似的编码（例如，iso8859-15非常相似）。那些字节序列根本不是有效的UTF-8。

简单的解决方法是将charset =更改为实际正确值，如果您知道，或者可以放心地猜测它。如果你不能，也许你根本就不应该生成这个消息。