新建的12.56版本，发送某些域址是显如下错误，发QQ等邮箱正常

eoeol

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您的邮件未投递给一个或多个收件人。
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Failed address: zxx@B.com

--- Session Transcript ---
Tue 2014-02-25 17:00:43: Parsing message <xxxxxxxxxxxxxxxxxxxxxxxx\pd35000000005.msg>
Tue 2014-02-25 17:00:43: *  From: zxx@A.cn
Tue 2014-02-25 17:00:43: *  To: zxx@B.com
Tue 2014-02-25 17:00:43: *  Subject: =?gb2312?B?s/a0prLOv7w=?=
Tue 2014-02-25 17:00:43: *  Size (bytes): 1801
Tue 2014-02-25 17:00:43: *  Message-ID: <53B7CAF8BFFA406D9C8A2B0701FD2C51@eoeol>
Tue 2014-02-25 17:00:43: Attempting SMTP connection to [B.com]
Tue 2014-02-25 17:00:43: Resolving MX records for [B.com] (DNS Server: 61.177.7.1)...
Tue 2014-02-25 17:00:43: *  P=005 S=000 D=B.com TTL=(40) MX=[B.com]
Tue 2014-02-25 17:00:43: Attempting SMTP connection to [B.com:25]
Tue 2014-02-25 17:00:43: Resolving A record for [B.com] (DNS Server: 61.177.7.1)...
Tue 2014-02-25 17:00:43: *  D=B.com TTL=(52) A=[221.224.167.X]
Tue 2014-02-25 17:00:43: Attempting SMTP connection to [221.224.167.218:25]
Tue 2014-02-25 17:00:43: Waiting for socket connection...
Tue 2014-02-25 17:00:43: *  Connection established (192.168.0.35:1439 -> 221.224.167.X:25)
Tue 2014-02-25 17:00:43: Waiting for protocol to start...
Tue 2014-02-25 17:00:43: <-- 220 ***************************************************************
Tue 2014-02-25 17:00:43: --> EHLO A.cn
Tue 2014-02-25 17:00:43: <-- 250-B.com Hello A.cn, pleased to meet you
Tue 2014-02-25 17:00:43: <-- 250-ETRN
Tue 2014-02-25 17:00:43: <-- 250-AUTH LOGIN CRAM-MD5 PLAIN
Tue 2014-02-25 17:00:43: <-- 250-8BITMIME
Tue 2014-02-25 17:00:43: <-- 250 SIZE
Tue 2014-02-25 17:00:43: --> MAIL From:<zxx@A.cn> SIZE=1801
Tue 2014-02-25 17:00:43: <-- 250 <zxx@A.cn>, Sender ok
Tue 2014-02-25 17:00:43: --> RCPT To:<zxx@B.com>
Tue 2014-02-25 17:00:43: <-- 530 Authentication required
Tue 2014-02-25 17:00:43: --> QUIT
--- End Transcript ---

Kyan

不是錯誤，而是需要進行身份驗證 。

eoeol

那要如何处理呢？

牧马

看DNS，楼主苏州地区的吧

山坛兄弟

客户端勾选 SMTP身份验证即可