Are you using zen.spamhaus.org or dbl.spamhaus.org for fighting spam? Pay attention! - Zimbra : Blog
Exploits Blocklist (XBL) | IP DNSBL for email filtering
Are you using zen.spamhaus.org or dbl.spamhaus.org for fighting spam? Pay attention! - Zimbra : Blog
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查询及申诉过程： 从www.spamhaus.org中移除垃圾邮件黑名单
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SMTP
All incoming emails have stopped and using Spamhaus? Here is why! | Keeping you connected with everything from Dynu
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