On 2006-10-24 at 01:54 -0700, Adam D wrote:
> This is the basic script I have been trying to work:
>
> elsif anyof (header :contains "Content-Type" "gif") {
> fileinto "system.2-mail.missed-spam";
> }
Michael Menge has explained what to look at. I'll explain why your
approach isn't working.
Where an image is sent as an attachment, rather than as the only content
of the email (and with many mail-clients, even then), the image is one
part of a "multipart" message.
The mail's top-level Content-Type: header will then contain
"multipart/mixed"; each part then has its own set of MIME headers,
including content-type.
You might want to read RFC 2046, section 5.
RFC 2046 is MIME Part 2, Media Types.
Section 5 is "Composite Media Type Values".
What you'll typically see is something vaguely like:
From: ..
To: ..
Subject: foo
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="fred"
Blurb for non-MIME mail-clients, ignored by all MIME clients
--fred
Content-Type: multipart/related; boundary="barney"
--barney
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
The plain text.
--barney
Content-Type: text/html; charset=US-ASCII
Content-Transfer-Encoding: 7bit
<p>Some HTML here, with an
<img src="cid:wilma-gif-2006102400001@mail.example.org">image inlined</img>
</p>
--barney--
--fred
Content-Type: image/gif; name="wilma.gif"
Content-Transfer-Encoding: base64
Content-Disposition: inline
Content-ID: <wilma-gif-2006102400001@xxxxxxxxxxxxxxxx>
base64/text+here==
--fred--
Or the image might not be flowed inline by the HTML and left as an
attachment which a client might choose to show after the text content.
Regards,
-Phil
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