邮件不能往指定的邮箱发信。

tm11

我的邮件服务器收发都正常，就是不能给某个邮箱发信，返回错误信息如下：
Permanent Delivery Failure

The attached message had PERMANENT fatal delivery errors!

After one or more unsuccessful delivery attempts the attached message has
been removed from the mail queue on this server.  The number and frequency
of delivery attempts are determined by local configuration parameters.

YOUR MESSAGE WAS NOT DELIVERED TO ONE OR MORE RECIPIENTS!

Failed address: don@fhtf.de

--- Session Transcript ---
Sat 2009-05-23 18:01:55: Parsing Message
<xxxxxxxxxxxxxxxxxxxxxxxx\pd50000027463.msg>
Sat 2009-05-23 18:01:55: From:tang@dami.com Sat 2009-05-23
18:01:55: To: don@fhtf.de  Sat 2009-05-23 18:01:55: Subject: book thickness
for your sample copy  Sat 2009-05-23 18:01:55: Message-ID:
<001001c9db8c$e7172d50$b54587f0$@com>
Sat 2009-05-23 18:01:55: MX-record resolution of [fhtf.de] in progress (DNS
Server: 202.96.134.133)...
Sat 2009-05-23 18:01:55: *  P=100 S=000 D=fhtf.de TTL=(56)
MX=[mxlb.ispgateway.de] {80.67.18.126}  Sat 2009-05-23 18:01:55: Attempting
MX: P=100 S=000 D=fhtf.de TTL=(56) MX=[mxlb.ispgateway.de] {80.67.18.126}
Sat 2009-05-23 18:01:55: Attempting SMTP connection to [80.67.18.126 : 25]
Sat 2009-05-23 18:01:55: Waiting for connection...
Sat 2009-05-23 18:01:59: Connection established (58.61.38.120 : 1819 -> 80.
67.18.126 : 25)  Sat 2009-05-23 18:01:59: Waiting for protocol initiation...
Sat 2009-05-23 18:02:46: <-- 550 No reverse dns for IP 58.61.38.120. Help
at/Hilfe unter www.mfaq.info
--- End Transcript ---
: Message contains [1] file attachments

请大侠们来帮忙看看是什么问题。

tm11

请问域名反析，是在服务器上做？还是要在被人的服务器上做？  谢谢，我是新手！

neil.fu

反解需要找ISP做，但问题是即是做了反解，退信问题还是会有的！

yudong118

反解好像是要收费的。。发国外的邮件基本都要做反解，要不根本就发不出去。

U-Mail

找个好中继吧