邮箱不可用。服务器响应:5.4.1中继访问被拒绝_未分类的问答_编程通用

I am getting "Mailbox unavailable. The server response was: 5.4.1 Unable to relay for myemail@mydomain.com" when I try to send the mail using C# code.

 

Then I tested my smtp server https://www.wormly.com/test_smtp_server".

 

Here when I enter my smtp server, sender and recipient name. I got followoing message:

 

MAIL FROM: mymail@mydomain.com

 

SMTP -> FROM SERVER:

 

250 2.1.0 Sender OK

 

RCPT TO: anothermail@mydomain.com

 

SMTP -> FROM SERVER:

 

550 5.4.1 Relay Access Denied

 

SMTP -> ERROR: RCPT not accepted from server: 550 5.4.1 Relay Access Denied

 

Message sending failed.

|沙拉德・米什拉:phil.o:您的SMTP服务器应配置一个域（即mydomain.com）的权威。最好选择一个邮件域名是比较有代表性（mydomain.com似乎太多太多的通用的方式）

邮箱不可用。服务器响应:5.4.1中继访问被拒绝

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