On Sun, Feb 08, 2009 at 01:01:49PM +0800, jan gestre wrote:

> New logs with reject_rbl_client sbl-xbl.spamhaus.org added to main.cf
> 
> 
> eb  8 12:49:52 kartero postfix/smtpd[6465]: NOQUEUE: reject: RCPT from
> web57902.mail.re3.yahoo.com[68.142.236.95]: 554 5.7.1 Service
> unavailable; Client host [68.142.236.95] blocked using
> sbl-xbl.spamhaus.org; from=<jan.ges...@yahoo.com>
> to=<jan.ges...@ddbphil.com> proto=SMTP
> helo=<web57902.mail.re3.yahoo.com>

Your DNS server is fabricating A records for non-existent hosts. The
real spamhaus would have also returned a TXT record with a URL for
looking up the reason for the block.

Don't use ISP DNS servers that fabricate A records.

-- 
        Viktor.

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