https://issues.apache.org/SpamAssassin/show_bug.cgi?id=6149
Summary: False positives for ISO-2022-JP (Japanese)
Product: Spamassassin
Version: 3.2.5
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: P2
Component: Score Generation
AssignedTo: [email protected]
ReportedBy: [email protected]
High rate of false positives occur for ISO-2022-JP encoded e-mails. This is a
very critical problem for all Japanese users.
As examples, merely having any one of the following 3 legitimate lines of text
in the Subject will trigger PLING_QUERY (2.2) and TVD_SPACE_RATIO (2.9),
flagging the e-mail as SPAM:
【麻生内閣メールマガジン 第３６号】安心・活力・責任（2009/06/25）
コンピュータサービスの件
[物件内見]メールフォームからメールが送信されました
In the e-mail's Body, certain legitimate text may also trigger WEIRD_QUOTING
(2.8), OBSCURED_EMAIL (1.9), or other conditions. Examples will be supplied
upon request.
Such false positives DO NOT OCCUR for utf-8 encoding using the exact same text.
(This problem may be due to double-byte-character processing. If so, other
double-byte-character sets should be checked for the same problem, such as Big5
in Chinese.)
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