https://issues.apache.org/SpamAssassin/show_bug.cgi?id=6065
Summary: SUBJ_RE_NUM triggers false positives - should be removed
Product: Spamassassin
Version: 3.2.5
Platform: Other
OS/Version: All
Status: NEW
Severity: major
Priority: P5
Component: Rules
AssignedTo: [email protected]
ReportedBy: [email protected]
SUBJ_RE_NUM raises false positives and should be removed. This rule checks the
number after “Re” in subject, and if there is a number, e.g. “Re[5]:
Antivirus” and no “X-Mailer: The Bat!” header, this rule is triggered.
In The Bat!, both “Re numbering” and “X-Mailer” options are
configurable in the program interface, and the user is able to independently
switch them on and off, which creates false positives.
I receive a lot of messages from The Bat! users and this rule bothers me
significantly. Problem is that a number of Internet service providers claim
that The Bat! is a spamming tool and, on that basis, block messages containing
"The Bat!" in an X-mailer header. That's why the legitimate users of The Bat!
have configured to not include the X-mailer into the messages, which, in its
turn, triggers the SUBJ_RE_NUM.
Another reason to drop the SUBJ_RE_NUM is that somebody may use an e-mail
client (say, "A-Mail") that does not change subject on reply, and when the user
of A-Mail will reply to a message from The Bat! with "Re[3]:", SpamAssassin
will raise a false positive.
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