先是邮件达到前过滤
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Tests (before email arrival):
Bonded Sender Program,
automatic sender whitelist,
greylisting.
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接着就是达到后过滤
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Tests (on email arrival):
Bonded Sender Program,
automatic sender whitelist,
reverse DNS,
DNS blacklists,
HELO blacklist,
SPF test,
IP blacklist,
sender blacklist,
recipient blacklist,
Active Directory integration,
keyword filtering,
attachment filtering,
URL blacklists.
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以上是个人总结,欢迎拍砖!!! |