https://issues.apache.org/SpamAssassin/show_bug.cgi?id=4352





--- Comment #12 from Dilyan Palauzov <[EMAIL PROTECTED]>  2008-03-31 16:52:42 
PST ---
> As a matter of interest, are there any ways to tell that a set of 
> RFC-2822 headers use draft-ietf-eai-utf8headers headers, or not?  scanning 
> for UTF-8 chars?

draft-ietf-eai-utf8headers can be used, only if the MTA advertises UTF8SMTP.
The sending client does not confirm that UTF8SMTP will be used, it is just
used. However UTF8SMTP can be used only when 8BITMIME is offered by the MTA and
the client declared its usage for the current message (in MAIL FROM: ...
BODY=8BITMIME).

Hence, my suggestion is to let spamc accept one more parameter and reports to
spamd if the client has used 8BITMIME and the MTA offered UTF8SMTP . In this
case using UTF8 in headers shall lead to less spam scores, than in all other
cases (all other cases = the mail contains 8 bit headers and the client does
not use 8BITMIME or the server/MTA does offer UTF8SMTP or 8BITMIME) and the
currently associated scores for SUBJ_ILLEGAL_CHARS .


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