邮箱无法收信 554 Account Not auth

一直使用正常，今日有客户告知无法发送邮件给我们邮箱。
报错信息  

Reporting-MTA: dns; googlemail.com
Received-From-MTA: dns; nick.li.0923@gmail.com
Arrival-Date: Tue, 15 Jan 2019 02:58:37 -0800 (PST)
X-Original-Message-ID: <1efc01d4acc1$435693c0$ca03bb40$@gmail.com>

Final-Recipient: rfc822; info@knconsulting.co.nz
Action: failed
Status: 5.0.0
Remote-MTA: dns; out.mx.faipod.com. (107.150.106.198, the server for the
 domain knconsulting.co.nz.)
Diagnostic-Code: smtp; 554 Account Not auth
Last-Attempt-Date: Tue, 15 Jan 2019 02:58:39 -0800 (PST)

Message not delivered

There was a problem delivering your message to info@knconsulting.co.nz. See the technical details below, or try resending in a few minutes.

The response from the remote server was:

554 Account Not auth

尝试删除了域名下的所有解析，只留下了阿里云的邮箱解析