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Problems Parsing Emails with Attached Images Due to Missing Content-Type Header from Microsoft Exchange #370

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frederikchrlarsen opened this issue Jun 7, 2024 · 0 comments
Open

Problems Parsing Emails with Attached Images Due to Missing Content-Type Header from Microsoft Exchange #370

frederikchrlarsen opened this issue Jun 7, 2024 · 0 comments

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@frederikchrlarsen
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I am having some problems with parsing emails when there is an image attached. It seems like the email sender (Microsoft Exchange) does not include Content-Type: text/plain; charset="iso-8859-1" (see "successful" email), but instead includes it embedded in the html of the email itself like: <html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; charset= =3Diso-8859-1"> (see "failing" email)

If I manually set the charset in mail-parser.js to iso-8859-1 the "failing" email is decoded correctly and the expected output is received

image

Failing email

I have removed sensitive information

Delivered-To: [email protected]
Content-Type: multipart/related;
        boundary="_f296c068-7ef1-4c7a-b03e-49534e067c56_"
From: =?iso-8859-1?Q?Asd_S=F8nasd_S=F8asd?= <[email protected]>
To: "[email protected]" <Test>
Subject: Test
Thread-Topic: Test
Date: Thu, 6 Jun 2024 10:46:09 +0000
Accept-Language: da-DK, en-US
Content-Language: da-DK
MIME-Version: 1.0

--_f296c068-7ef1-4c7a-b03e-49534e067c56_
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; charset=
=3Diso-8859-1">
<meta name=3D"Generator" content=3D"Microsoft Exchange Server">
<!-- converted from text -->
<style>.EmailQuote { margin-left: 1pt; padding-left: 4pt; border-left: #800=
000 2px solid; }</style></head>
<body>
<font size=3D"2"><div class=3D"PlainText">Kundenr*:;12345678<br>
Kundenavn*:;Teeest - Test<br>
Adresse*:;Testvej 1234<br>
Postnummer*:;1234<br>
By*:;Testby<br>
Mail*:;[email protected]<br>
Telefon*:;&#43;45 12345678<br>
;<br>
Husst=F8rrelse:;<br>
Nuv=E6rende opvarmning:;<br>
Nuv=E6rende forbrug:;<br>
;<br>
Qkunde;Teeest - Test<br>
Qskabelon;Testvejledning<br>
</div></font></body>
</html>

--_f296c068-7ef1-4c7a-b03e-49534e067c56_
Content-Description: image.png
Content-Type: image/png;
        name="image.png"
Content-Disposition: inline;
        filename="image.png"
Content-Transfer-Encoding: base64
Content-ID: <image.png>

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--_f296c068-7ef1-4c7a-b03e-49534e067c56_--

Successful email (no image attached)

I have removed sensitive information

Delivered-To: [email protected]
From: test <[email protected]>
To: "[email protected]" <[email protected]>
Subject: Test
Thread-Topic: Test
Date: Fri, 7 Jun 2024 09:29:21 +0000
Accept-Language: da-DK, en-US
Content-Language: da-DK
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0

Kundenr*:;1234
Kundenavn*:;Test test
Adresse*:;test 7, test
Postnummer*:;123
By*:;test
Mail*:;[email protected]
Telefon*:;12345678
;
Husst=F8rrelse:;
Nuv=E6rende opvarmning:;
Nuv=E6rende forbrug:;
;
Qnavn;test 7, test, 1234 Test - Test
Qkunde;Test Test
Qskabelon;Testvejledning
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@frederikchrlarsen