I have found that IP Address of Yahoo groups mailing list is blocked by spamcop. This will be bring numerous member of yahoo groups cathegorized as "soft-bounced member", if their MTA use spamcop service.
see this log of my postfix mail server :
Sep 12 15:18:47 if postfix/smtpd: NOQUEUE: reject: RCPT from n4.bulk.dcn.yahoo.com[184.108.40.206]: 554 Service unavailable; Client host [220.127.116.11] blocked using bl.spamcop.net; Blocked - see http://www.spamcop.net/bl.shtml?18.104.22.168; from=<sentto-3223109-3541-1126512025-xxx=xxx.xxx[at]returns.groups.yahoo.com> to=<xxx[at]xxx.xxx> proto=SMTP helo=<n4.bulk.dcn.yahoo.com>
xxx[at]xxx.xxx is one of email address of my mail server
Is there any mechanism that Spamcop Block List have some exceptional IP Address ?
NOTE: this post was actually started as a new topic and was later merged into this topic by Forum Admin