SMTP 211 System Status vs 235 Authentication Successful
Both SMTP 211 (System Status) and 235 (Authentication Successful) belong to the 2xx Positive Completion category. 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. Meanwhile, 235 means that the client has been successfully authenticated using the AUTH command. The server will now accept mail commands from this authenticated session.
Описание
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.
Когда вы это видите
When querying the mail server for its status or capabilities. The server is sharing diagnostic or informational details about itself.
Как исправить
No fix needed — this is an informational response. If the status indicates a problem, review the server's configuration or contact the mail administrator.
Описание
The client has been successfully authenticated using the AUTH command. The server will now accept mail commands from this authenticated session.
Когда вы это видите
After submitting valid credentials via the AUTH command (LOGIN, PLAIN, or other SASL mechanism). The server has verified your identity and you can now send mail.
Как исправить
No fix needed — authentication succeeded. If you expected this but received a different code, double-check your username, password, and the authentication mechanism.
Ключевые различия
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 235: The client has been successfully authenticated using the AUTH command. The server will now accept mail commands from this authenticated session.
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 235 when after submitting valid credentials via the AUTH command (LOGIN, PLAIN, or other SASL mechanism). The server has verified your identity and you can now send mail.
Когда что использовать
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 235 (Authentication Successful): No fix needed — authentication succeeded. If you expected this but received a different code, double-check your username, password, and the authentication mechanism.