https://issues.apache.org/SpamAssassin/show_bug.cgi?id=6067
Summary: SpamAssassin is currently unable to reliably detect The
Bat! by Message-ID; rule FORGED_MUA_THEBAT_MSGID is
missing
Product: Spamassassin
Version: 3.2.5
Platform: Other
OS/Version: All
Status: NEW
Severity: enhancement
Priority: P5
Component: Rules
AssignedTo: [email protected]
ReportedBy: [email protected]
A reliable way to detect The Bat! is by message-id, not by x-mailer.
Here is the Delphi code from The Bat! that makes the message-id:
Result := Format('<%d%d.%4.4d%2.2d%2.2d%2.2d%2.2d%2...@%s>',
[Random(200), Random(MaxInt div 200), Year,
Month, Day, Hour, Min, Sec, S]);
where
* Random(n) gives [0..n-1]
* MaxInt div 200 = 10737418
* Year, Month, Day, Hour, Min, Sec are in local time
* S contains an FQDN
For example, Message-ID: <[email protected]>
We should add the following rule:
meta FORGED_MUA_THEBAT_MSGID (__THEBAT_MUA && !__BAT_MSGID)
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