Matus UHLAR - fantomas wrote:
I remember I have asked the same some years ago.
http://www.gossamer-threads.com/lists/spamassassin/users/104646
the explanation was that the current rule detects empty subject the
same as
no subject at all. IIRC it was in fact the same rule as it is now:
header __HAS_SUBJECT exists:Subject
In a 2007 posting:
| The header "exists:header_name" test really converts into:
| header_data =~ /./
It was true years ago, but is no longer the case.
The 'exists:' now tests for a presence of a header field
(regardless of its header body - empty or not).
A test like:
header L_EMPTY_SUBJECT Subject !~ /\S/
triggers on both cases: missing or empty Subject header field.
Its counterpart:
header L_NONEMPTY_SUBJECT Subject =~ /\S/
Mark
