请教，以下情况如何解决。谢谢。
his is the mail system at host iredmail.domain.com.

I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can delete your own text from the attached returned message.

                   The mail system

<邮箱>: Host or domain name not found. Name service error
    for name=域名 type=MX: Non-recoverable error

[ 本帖最后由 aw8 于 2009-12-11 22:08 编辑 ]