求助110端口问题

babala110

ros2.9.27版本
安装imail
开放25 和110端口如下：
General:
chain：dst-nat
Src.Address:空
Dst..Address:空
Protocol:6(tcp)
Src.port:空
Dst.port:25
下面都为空
Action:
Action:dst-nat
To Addresses:192.168.0.XX（注：imail服务器内网地址）
To Port:25
110端口一样的设置。结果出现能接收邮件而不能发送邮件，退信提示：
Unknown user: babalahong@yahoo.com.cn
RCPT TO generated following response:
550 not local host yahoo.com.cn, not a gateway
imail日志：
03:29 11:19 SMTPD(b54f02e800000b33) [192.168.0.3] connect 192.168.0.3 port 2009
03:29 11:19 SMTP-(b555000006186704) processing D:\IMail\spool\Qb55500000ad066e5.GSC
03:29 11:19 SMTP-(b555000006186704) Trying yahoo.com.cn (0)
03:29 11:19 SMTPD(b55502d500000b34) [192.168.0.3] connect 192.168.0.251 port 2011
03:29 11:19 SMTPD(b55502d500000b34) [192.168.0.251] EHLO concord.cn
03:29 11:19 SMTPD(b55502d500000b34) [192.168.0.251] MAIL FROM:<babala@concord.cn>
03:29 11:19 SMTP-(b555000006186704) Connect yahoo.com.cn [203.209.228.230:25] (1)
03:29 11:19 SMTP-(b555000006186704) 220 concord.cn (IMail 8.20 2356-1) NT-ESMTP Server X1
03:29 11:19 SMTP-(b555000006186704) >EHLO concord.cn
03:29 11:19 SMTP-(b555000006186704) 250-concord.cn says hello
03:29 11:19 SMTP-(b555000006186704) 250-SIZE 0
03:29 11:19 SMTP-(b555000006186704) 250-8BITMIME
03:29 11:19 SMTP-(b555000006186704) 250-DSN
03:29 11:19 SMTP-(b555000006186704) 250-ETRN
03:29 11:19 SMTP-(b555000006186704) 250-AUTH LOGIN
03:29 11:19 SMTP-(b555000006186704) 250-AUTH=LOGIN
03:29 11:19 SMTP-(b555000006186704) 250-EXPN
03:29 11:19 SMTP-(b555000006186704) 250 STARTTLS
03:29 11:19 SMTP-(b555000006186704) >MAIL FROM:<babala@concord.cn>
03:29 11:19 SMTP-(b555000006186704) 250 ok
03:29 11:19 SMTP-(b555000006186704) >RCPT To:<babalahong@yahoo.com.cn>
03:29 11:19 SMTPD(b55502d500000b34) [192.168.0.251] RCPT To:<babalahong@yahoo.com.cn>
03:29 11:19 SMTPD(b55502d500000b34) [192.168.0.251] ERR concord.cn invalid user <babalahong@yahoo.com.cn
03:29 11:19 SMTP-(b555000006186704) 550 not local host yahoo.com.cn, not a gateway
03:29 11:19 SMTP-(b555000006186704) >QUIT
03:29 11:19 SMTP-(b555000006186704) 221 Goodbye
03:29 11:19 SMTP-(b555000006186704) Creating message from Postmaster
03:29 11:19 SMTP-(b555000006186704) Delivery process now using new file: b555000006186733
03:29 11:19 SMTP-(b555000006186704) finished D:\IMail\spool\Qb55500000ad066e5.GSC status=2
03:29 11:19 SMTP-(b555000006186733) processing D:\IMail\spool\Qb555000006186733.GSE
03:29 11:19 SMTP-(b555000006186733) ldeliver concord.cn babala-main (1)  947
03:29 11:19 SMTP-(b555000006186733) finished D:\IMail\spool\Qb555000006186733.GSE status=1
请高手解惑，谢谢！

另外要说一下的就是，以前imail正常，也就是说排除域名解析的问题了