以下是我用公司的企业邮箱发给韩国雅虎邮箱的退信，大家帮我看看，到底是什么原因造成的？如果是我的邮件服务器设置问题，请告诉我该修改什么设置？如果是对方邮件服务器的限制，请告诉我该如何协助对方邮箱解决？
. Hi. This is the qmail-send program at mail.aaa.com.cn. (假如我公司的邮箱域名为aaa.com.cn)
> I'm afraid I wasn't able to deliver your message to the following addresses.
> This is a permanent error; I've given up. Sorry it didn't work out.
>
> <
shinshinglass@yahoo.co.kr>:
> Connected to 202.165.108.248 but greeting failed.
> Remote host said: 453 Mail from 111.111.111.111 not allowed - [90] （假定111.111.111.111是我公司邮件服务器的公网ip地址）
> I'm not going to try again; this message has been in the queue too long.
>
> --- Below this line is a copy of the message.
。。。。。。。。。。
