The cps datensysteme rule (from cps-datensysteme.de + subject "Rechnung"
+ has_attachment true + date after) was failing on real invoices from
CPS ORMS. Their PDFs arrive without a Content-Disposition header — the
filename lives only on the Content-Type parameter — so _has_attachment
returned False and the rule never matched.
Extended the check to also count a part as an attachment when it has a
filename() and its content-type is neither text/* nor multipart/*.
That catches PDFs, Office and image attachments regardless of whether
the sender set Content-Disposition, without treating body parts as
attachments. Verified against four synthetic cases including the exact
CPS ORMS shape.
Same helper is now applied to non-multipart mails too, in case an entire
mail is a single attached file (rare but possible).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
duffyduckandClaude Opus 4.7
51ed9e4235