阿里云企业邮箱 501 SMTP server error: MAIL FROM command failed Detail: "MAIL FROM" is non-local account

使用程序来发送阿里云企业邮件，发现如何调试均是501错误代码。经过调试排查掉了（网页和客户端使用时是均正常收发）帐号、ssl、阿里邮箱smtp地址等原因。

2020-06-15 09:31:47 CLIENT -> SERVER: EHLO localhost.localdomain
2020-06-15 09:31:47     CLIENT -> SERVER: AUTH LOGIN
2020-06-15 09:31:47     CLIENT -> SERVER: [credentials hidden]
2020-06-15 09:31:47     CLIENT -> SERVER: [credentials hidden]
2020-06-15 09:31:47     CLIENT -> SERVER: MAIL FROM:<passwd@kinggoo.com>
2020-06-15 09:31:47     SMTP ERROR: MAIL FROM command failed: 501 "MAIL FROM" is non-local account
2020-06-15 09:31:47     The following From address failed: passwd@kinggoo.com : MAIL FROM command failed,"MAIL FROM" is non-local account
                                          ,501,SMTP server error: MAIL FROM command failed Detail: "MAIL FROM" is non-local account
                                            SMTP code: 501
邮件发送失败: The following From address failed: passwd@kinggoo.com : MAIL FROM command failed,"MAIL FROM" is non-local account
,501,SMTP server error: MAIL FROM command failed Detail: "MAIL FROM" is non-local account
  SMTP code: 501SMTP server error: MAIL FROM command failed Detail: "MAIL FROM" is non-local account
  SMTP code: 5012020-06-15 09:31:47      CLIENT -> SERVER: QUIT

最后狂翻阿里云的帮助文件也没找到原因，后来无意登陆邮箱帐号，发现在网页邮箱最上面有一条小字，大概意思就是没有设置属于企业的解析，会影响到邮件的使用。

看自己企业域名的解析 发现没有自己域名的mx。

解析记录类型  解析记录值 优先级

MX mx2.qiye.aliyun.com 10

MX mx2.qiye.aliyun.com 5

加上后解决。