客户端,用OU或FOXMAIL ,发送邮件,报错:

由于服务器拒绝接受发件人的电子邮件地址，这封邮件无法发送。发件人的电子邮件地址是“heyunfei@cctv.net”。 主题 '我的', 帐户: 'heyunfei@cctv.net', 服务器: 'mail.cctv.net', 协议: SMTP, 服务器响应: '536 authentication failed.', 端口: 25, 安全(SSL): 否, 服务器错误: 536, 错误号: 0x800CCC78

经测试, 通过WEB方式,进行收发邮件正常,但通过OU或FOXMAIL,能收邮件,但不能发邮件.

检查服务器服务,监听,都正常.
GOOGLE : 536 authentication failed
网上都说是客户端配置问题. 可本人坚信客户端配置正常.

继续找服务端的问题....

把MAIL服务重装...

结果还是一样.

TELNET MAIL.cctv.net 25
220 ***************0***************** >
ehlo localhost >
502 Error: command not implemented >
helo >
502 Error: command not implemented

发现,25端口不正常

还是GOOGLE :telnet error command not implemented

终于找到了我要的答案:
-------------------------------------------------------------
http://www.5dmail.net/html/2007-1-4/200714143124.htm
cisco pix防火墙接管smtp的问题
出处： 作者： 时间：2007-1-4 14:31:00
现象：
telnet

mail.aaaaaaaaaaaaaa.com 25
Trying ddd.ddd.ddd.ddd…
Connected to mail.aaaaaaaaaaaaaa.com.
Escape character is ‘^]’.
220 ****0**********************************
ehlo aaaaaaaaaaaaaa.com
502 Error: command not implemented
helo aaaaaaaaaaaaaa.com
250 mail01.aaaaaaaaaaaaaa.com
ehlo aaaaaaaaaaaaaa.com
502 Error: command not implemented

连接后出现
220 ****0**********************************
并且不支持ESMTP

解决办法：
no fixup protocol smtp 25

If you’re getting the *** banner, and EHLO not recognised and you have a PIX
in the way, it’s fixup, and there’s nothing else you can do. To give ammo if
you need it, Cisco deprecated fixup in v7 of the PIX OS, due to it not
understanding anything beyond RFC 821.

From their own docs:
The fixup protocol smtp command enables the Mail Guard feature. This restricts
mail servers to receiving the seven minimal commands defined in RFC 821,
section 4.5.1 (HELO, MAIL, RCPT, DATA, RSET, NOOP, and QUIT). All other
commands are rejected.

Microsoft Exchange server does not strictly comply with RFC 821 section 4.5.1,
using extended SMTP commands such as EHLO. PIX Firewall will convert any such
commands into NOOP commands, which as specified by the RFC, forces SMTP
servers to fall back to using minimal SMTP commands only. This may cause
Microsoft Outlook clients and Exchange servers to function unpredictably when
their connection passes through PIX Firewall.

You have a Cisco firewall with the SMTP fix-up feature enabled.
Turn it off.
-------------------------------------------------------------------

在防火墙上取消绑定后,能正常通过OU发送邮件了.
TELNET也正常了:
220 ESMTP on ........ ready.

结束.