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Date: Wed, 25 Dec 2002 12:59:25 GMT
From: Jorey Bump <devnull@joreybump.com>
To: comp.mail.sendmail@lists.cm.nu
Newsgroups: comp.mail.sendmail
Subject: Re: Need recipe to block based on charset

steveo@syslang.net (Steven W. Orr) wrote in 
news:m2el884si3.fsf@syslang.net:

> I'm getting stuff that has this in it:
> 
> Content-Type: text/html; charset=euc-kr
> 
> Does someone have something I can add to my sendmail.mc that would
> reject this type of stuff?

I use the following, and it has been very effective:

LOCAL_CONFIG

dnl regex map for character sets (not case-sensitive)
KCharsetKorean regex -a@MATCH charset=.*(euc-kr|korean|ks.*c)
KCharsetChinese regex -a@MATCH charset=.*(big5|Chinese|cn|gb)

LOCAL_RULESETS

##################################################################
#  Local ruleset - Check Content-Type:                           #
##################################################################
dnl Reject based on Content-Type header
HContent-Type:          $>CheckContentType
D{NoKoreanMsg}Korean not spoken here.
D{NoChineseMsg}Chinese not spoken here.

SCheckContentType
R$*             $: $(CharsetKorean $&{currHeader} $)
R@MATCH         $#error $: 550 5.7.0 ${NoKoreanMsg}
R$*             $: $(CharsetChinese $&{currHeader} $)
R@MATCH         $#error $: 550 5.7.0 ${NoChineseMsg}
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