Thanks very much for your help. I have already raised the complaint to ISP. Meanwhile, I have checked 126.96.36.199 not listed in bl.spamcop.net. But when I sent email to customer, it shown that 188.8.131.52 is in blocked list.
Can anybody tell me why? Thank you.
Remote host said: 501 5.7.1 <goldencard[at]goldencard.net>... Sender refused by the DNSBL bl.spamcop.net
--- Below this line is a copy of the message.
Received: (qmail 17843 invoked from network); 14 Nov 2005 06:36:33 -0000
Received: from unknown (HELO mike) (184.108.40.206)
by hm3.hosting-mail.com with SMTP; 14 Nov 2005 06:36:33 -0000
X-Priority: 3 (Normal)
X-Mailer: Microsoft Outlook, Build 10.0.2627
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165