用nslookup查看郵件服務器的IP是否被SpamAdvisory列入黑名单
网上有很多spam advisory数据库，例如spamhaus之类的。
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例如，要查询IP 1.2.3.4 是否被ahbl.org列入黑名单，可以用下列命令
nslookup 4.3.2.1.DNSbl.ahbl.org
如果返还的结果是Non-existent domain，说明没有问题
如果返还的结果是127.0.0.x，说明被列入了黑名单，x有可以能是1-255的数值，具体原因就因数据库而异了。
当然，有些数据库提供网页查询，也很方便。
用命令查看的好处是可以写脚本同时查看多个数据库。
附上一些反垃圾邮件组织的域名表
asiaspam.spamblocked.com
bl.deadbeef.com
bl.emailbasura.org
bl.spamcop.net
blackholes.five-ten-sg.com
blacklist.woody.ch
bogons.cymru.com
cbl.abuseat.org cdl.anti-spam.org.cn
combined.abuse.ch
combined.rbl.msrbl.net
db.wpbl.info
dnsbl-1.uceprotect.net
dnsbl-2.uceprotect.net
dnsbl-3.uceprotect.net
dnsbl.abuse.ch
dnsbl.ahbl.org
dnsbl.cyberlogic.net
dnsbl.inps.de
dnsbl.njabl.org
dnsbl.sorbs.net
drone.abuse.ch
duinv.aupads.org
dul.dnsbl.sorbs.net
dul.ru
dyna.spamrats.com
dynip.rothen.com
eurospam.spamblocked.com
fl.chickenboner.biz
http.dnsbl.sorbs.net
p_w_picpaths.rbl.msrbl.net
ips.backscatterer.org
isps.spamblocked.com
ix.dnsbl.manitu.net
korea.services.net
lacnic.spamblocked.com
misc.dnsbl.sorbs.net
noptr.spamrats.com
ohps.dnsbl.net.au
omrs.dnsbl.net.au
orvedb.aupads.org
osps.dnsbl.net.au
osrs.dnsbl.net.au
owfs.dnsbl.net.au
owps.dnsbl.net.au
pbl.spamhaus.org
phishing.rbl.msrbl.net
probes.dnsbl.net.au
proxy.bl.gweep.ca
proxy.block.transip.nl
psbl.surriel.com
rbl.interserver.net
rdts.dnsbl.net.au
relays.bl.gweep.ca
relays.bl.kundenserver.de
relays.nether.net
residential.block.transip.nl
ricn.dnsbl.net.au
rmst.dnsbl.net.au
sbl.spamhaus.org
short.rbl.jp
smtp.dnsbl.sorbs.net
socks.dnsbl.sorbs.net
spam.dnsbl.sorbs.net
spam.rbl.msrbl.net
spam.spamrats.com
spamlist.or.kr
spamrbl.imp.ch
t3direct.dnsbl.net.au
tor.ahbl.org
tor.dnsbl.sectoor.de
torserver.tor.dnsbl.sectoor.de
ubl.lashback.com
ubl.unsubscore.com
virbl.bit.nl
virus.rbl.jp
virus.rbl.msrbl.net
web.dnsbl.sorbs.net
wormrbl.imp.ch
xbl.spamhaus.org
zen.spamhaus.org
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