Hotmail、Gmail、Yahoo拒收或列为垃圾邮件问题

kenny61736

经常有用户反应，hotmail,gmail,yahoo等国外几个大的邮箱拒收他们的邮件或把他们邮件列为垃圾邮件，通过检查他们的smtp日志，如下，
65.54.xxx.xxx   [02F4] 14:52:24 Client session Connected
65.54.xxx.xxx   [02F4] 14:52:24 Client session <<< 220 bay0-mc9-f5.bay0.hotmail.com Sending unsolicited commercial or bulk e-mail to Microsoft's computer network is prohibited. Other restrictions are found at http://privacy.msn.com/Anti-spam/. Violations
65.54.xxx.xxx   [02F4] 14:52:24 Client session >>> EHLO 59.42.xxx.xxx
65.54.xxx.xxx   [02F4] 14:52:24 Client session <<< 554 Transaction failed
65.54.xxx.xxx   [02F4] 14:52:24 Client session >>> HELO 59.42.xxx.xxx
65.54.xxx.xxx   [02F4] 14:52:24 Client session >>>
SYSTEM          [02F4] 14:52:24 Client session ***
1 9370 00:00:00 INCOMPLETE-SESSION LNF34424
该用户使用的是微力邮箱管理系统9.31，发现是由于他们在 SMTP中将 "邮件服务器主机" 设置为 IP 地址,影响了域名的反向解析，造成 MSN、gmail 等拒收。



还有被列为垃圾邮件是因为没有spf记录，SPF是为了防范垃圾邮件而提出来的一种DNS记录类型，它是一种TXT类型的记录，它用于登记某个域名拥有的用来外发邮件的所有IP地址，按照SPF的格式在DNS记录中增加一条TXT类型的记录，将提高该域名的信誉度，同时可以防止垃圾邮件伪造该域的发件人发送垃圾邮件。

发送到 HOTMAIL、GMAILl等国外邮箱必须为服务器设置 SPF 记录, 否则可能会被对方列为垃圾邮件, IceWarp邮件系统是支持spf的，所以先要在爱思华宝邮件服务器上配置使用spf，

然后要在域名系统（DNS）中发布spf记录。用nslookup命令查询，例如163.com的spf记录，
C:\Documents and Settings\Administrator>nslookup
Default Server:
ns.szptt.net.cn
Address:
202.96.134.133

> set type=txt
> 163.com
Server:
ns.szptt.net.cn
Address:
202.96.134.133

Non-authoritative answer:
163.com text =


"v=spf1 ip4:220.181.12.0/22 ip4:202.108.5.64/26 ip4:202.108.5.128/25 -all"

neil.fu

说的很对啊，但如果那样设置还会有退信呢！

dennishan

楼主根本混淆了Icewarp的SPF作用，SPF记录和邮件系统无关！在域名解析里面设置就OK了！
发不出去邮件和SPF也没太大关系。根本就是IP信誉度问题。

tdk

lz每次出来都会满腔热情地搞点事故

kenny61736

SPF technology allows the domain owner to add an additional DNS record for the domain, specifying which machines are authorized to send messages that report to be from this domain. Any SMTP server that is SPF compliant can check these records against the actual sending machine and decide whether to allow the message through.
But an inherent problem of SPF is SMTP forwarding . When a server forwards a message without changing the "mail from" Header this new message could fail SPF checking. This is solved by implementing SRS (Sender Rewriting Scheme ). SRS forces the rewriting of the " mail from" address by the forwarding server.

[ 本帖最后由 kenny61736 于 2008-11-19 00:02 编辑 ]

killall

不知道现在SPF用的多不多？

neil.fu

您的问题我们的中继完全能解决的!