HTML + TXT when there is an attachment

[omacchioni]

Hello,

I'm tying to send an e-mail with HTML + TXT content, as well as an attachment.

The issue I'm facing is that the body of the e-mail shows both the HTML and the TXT version one after the other.

The headers looks like:

[...]
Content-Type: multipart/mixed; boundary="===============4807966042008734145=="
MIME-Version: 1.0
Subject: XX

[...]

--===============4807966042008734145==
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 8bit

[...]


--===============4807966042008734145==
MIME-Version: 1.0
Content-Type: text/html; charset="utf-8"
Content-Transfer-Encoding: 8bit

[...]


--===============4807966042008734145==
Content-Type: application/octet-stream
MIME-Version: 1.0
Content-Disposition: attachment; filename="file.pdf"
Content-Transfer-Encoding: base64

[...]

Based on what I see by sending an e-mail from a real mail client, I assume they should look like:

[..]
Content-Type: multipart/mixed;
    boundary="_004_151D0F7563C8AE4DBD9C01360BBF70A22B989834SG000711corproo_"
MIME-Version: 1.0

--_004_151D0F7563C8AE4DBD9C01360BBF70A22B989834SG000711corproo_
Content-Type: multipart/alternative;
    boundary="_000_151D0F7563C8AE4DBD9C01360BBF70A22B989834SG000711corproo_"

--_000_151D0F7563C8AE4DBD9C01360BBF70A22B989834SG000711corproo_
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

[...]
--_000_151D0F7563C8AE4DBD9C01360BBF70A22B989834SG000711corproo_
Content-Type: text/html; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
[...]
--_000_151D0F7563C8AE4DBD9C01360BBF70A22B989834SG000711corproo_--

--_004_151D0F7563C8AE4DBD9C01360BBF70A22B989834SG000711corproo_
Content-Type: application/pdf; name="xx.pdf"
Content-Description: unknown.pdf
Content-Disposition: attachment; filename="xx.pdf"; size=160899;
    creation-date="Fri, 09 Nov 2012 09:59:36 GMT";
    modification-date="Wed, 14 Mar 2012 09:35:49 GMT"
Content-Transfer-Encoding: base64
[...]

Did anyone experience this issue? Is there a fix available?

Olivier

[sharoonthomas]

Is the problem in the PDF or the appearance of the email ?

[omacchioni]

The problem is the appearance of the mail.

When encountering a Content-Type: multipart/alternative;, the Mail client will select the most appropriate format to display the e-mail (either the text/plain or the text/html version). This is the expected behavior.

Poweremail generates - wrongly - a multipart/mixed content-type, so the e-mail client will display both versions - for the user, the content of the e-mail is present twice in the body of the mail.

I didn't check if poweremail has the same issue when there is no attachment to the e-mail.