SMTP 211 System Status vs 530 Authentication Required
SMTP 211 (System Status) is a 2xx Positive Completion response, while 530 (Authentication Required) is a 5xx Permanent Negative response. 211 indicates that a system status reply providing information about the mail server's current state. This is typically sent in response to a HELP or system inquiry command. In contrast, 530 means that the server requires authentication before accepting mail commands. You must issue the AUTH command with valid credentials before attempting to send mail.
설명
A system status reply providing information about the mail server's current state. This is typically sent in response to a HELP or system inquiry command.
이 코드를 보게 되는 경우
When querying the mail server for its status or capabilities. The server is sharing diagnostic or informational details about itself.
해결 방법
No fix needed — this is an informational response. If the status indicates a problem, review the server's configuration or contact the mail administrator.
설명
The server requires authentication before accepting mail commands. You must issue the AUTH command with valid credentials before attempting to send mail.
이 코드를 보게 되는 경우
When trying to send mail through a server that requires authentication (typical for submission on port 587) without first logging in with the AUTH command.
해결 방법
Authenticate using the AUTH command with your username and password before sending MAIL FROM. Ensure your email client is configured with the correct SMTP credentials and authentication method.
주요 차이점
211 is a 2xx Positive Completion response, while 530 is a 5xx Permanent Negative response.
SMTP 211: A system status reply providing information about the mail server's current state. This is typically sent in response to a HELP or system inquiry command.
SMTP 530: The server requires authentication before accepting mail commands. You must issue the AUTH command with valid credentials before attempting to send mail.
You encounter 211 when when querying the mail server for its status or capabilities. The server is sharing diagnostic or informational details about itself.
You encounter 530 when when trying to send mail through a server that requires authentication (typical for submission on port 587) without first logging in with the AUTH command.
언제 어떤 것을 사용할지
For 211 (System Status): No fix needed — this is an informational response. If the status indicates a problem, review the server's configuration or contact the mail administrator. For 530 (Authentication Required): Authenticate using the AUTH command with your username and password before sending MAIL FROM. Ensure your email client is configured with the correct SMTP credentials and authentication method.