https://issues.apache.org/SpamAssassin/show_bug.cgi?id=6182
Summary: MPART_ALT_DIFF_COUNT trips on valid Apple Mail
messages
Product: Spamassassin
Version: 3.2.5
Platform: All
OS/Version: All
Status: NEW
Severity: minor
Priority: P5
Component: Rules
AssignedTo: [email protected]
ReportedBy: [email protected]
We've recently (as of 2009-06 and 2009-07) received valid ham messages for
which the MPART_ALT_DIFF_COUNT test fires.
The X-Mailer header is:
X-Mailer: Apple Mail (2.935.3)
The problem is that the user replied to a message with this MIME structure:
multipart/signed
multipart/mixed
text/plain
text/rtf
text/plain
application/pgp-signature
When the sender did so, Apple Mail constructed a message like this:
multipart/signed
multipart/alternative
text/plain*
multipart/mixed
text/html*
text/rtf
text/html
application/pgp-signature
The asterisks denote the parts that were different encodings (text/plain versus
text/html) of the same content.
Of course, the sane thing to do would've been this:
multipart/signed
multipart/mixed
multipart/alternative
text/plain*
text/html*
text/rtf
text/html
application/pgp-signature
But alas, that's not what "Apple Mail (2.935.3)" did. :(
Is there any chance that the MPART_ALT_DIFF_COUNT could be tweaked to avoid
penalizing Apple Mail's stupidity?
Alas, I cannot attach the original messages, but I could manually construct
sample messages with the same bizarre MIME structure...
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