http://issues.apache.org/SpamAssassin/show_bug.cgi?id=5110
Summary: EXTRA_MPART_TYPE fires on valid multipart/related
Product: Spamassassin
Version: 3.1.5
Platform: Other
OS/Version: other
Status: NEW
Severity: normal
Priority: P5
Component: Rules
AssignedTo: [email protected]
ReportedBy: [EMAIL PROTECTED]
EXTRA_MPART_TYPE matches on Content-Type headers which also have a type=
parameter. However RFC 2387 specifies that "multipart/related" MUST have a
type parameter giving the MIME type of the root body part.
Around 10% of my hits on this rule are for Content-Type=multipart/related with
a type parameter, such as:
Content-Type: multipart/related; type="text/html"; boundary="..."
or
Content-Type: multipart/related; type="multipart/alternative";
In particular, M$ Exchange sometimes seems to make use of this format for
including background images. Much though I detest them, I'd prefer they
didn't contribute to a spam score !
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