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https://issues.apache.org/jira/browse/EMAIL-142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14153695#comment-14153695
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Thomas Neidhart commented on EMAIL-142:
---------------------------------------
The root container for the mime message will always be created with
content-type multipart/mixed, but in case text and html message has been
provided a child container with type multipart/alternative will be added
containing the 2 messages, see the example mail below:
{code}
Date: Tue, 30 Sep 2014 22:11:35 +0200 (CEST)
From: [email protected]
To: [email protected]
Message-ID: <21953712.11.1412107895751.JavaMail.tn@tn-laptop>
Subject: [email] 1.Test: text + html content
MIME-Version: 1.0
Content-Type: multipart/mixed;
boundary="----=_Part_9_12877540.1412107867547"
------=_Part_9_12877540.1412107867547
Content-Type: multipart/alternative;
boundary="----=_Part_10_11984121.1412107895170"
------=_Part_10_11984121.1412107895170
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Your email client does not support HTML messages
------=_Part_10_11984121.1412107895170
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: 7bit
<html><b>This is a HTML message without any image</b><html>
------=_Part_10_11984121.1412107895170--
------=_Part_9_12877540.1412107867547--
{code}
If I open this message with thunderbird, it correctly displays the HTML message.
> HtmlEmail with both html and text provided has invalid content-type
> --------------------------------------------------------------------
>
> Key: EMAIL-142
> URL: https://issues.apache.org/jira/browse/EMAIL-142
> Project: Commons Email
> Issue Type: Bug
> Affects Versions: 1.3.2
> Reporter: Marcin Tomiak
> Fix For: 1.3.3
>
> Original Estimate: 0.25h
> Remaining Estimate: 0.25h
>
> If I set both html and plain text for HtmlEmail i.e.:
> email.setHtmlMsg(htmlMessage);
> email.setTextMsg(plainTextMessage);
> then message which is sent has Content-type: multipart/mixed;
> This content type is recognized for example by Mozilla Thunderbird as a
> message with attachment.
> Correct content-type for this kind of email is Content-type:
> multipart/alternative;
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