SMTP 211 System Status vs 250 OK
Both SMTP 211 (System Status) and 250 (OK) 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, 250 means that the requested mail action has been completed successfully. This is the most common positive response in SMTP, returned after HELO/EHLO, MAIL FROM, RCPT TO, and DATA completion.
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 requested mail action has been completed successfully. This is the most common positive response in SMTP, returned after HELO/EHLO, MAIL FROM, RCPT TO, and DATA completion.
Когда вы это видите
After nearly every successful SMTP command — greeting, specifying sender, adding recipients, or completing message delivery. This is the standard success confirmation.
Как исправить
No fix needed — the command was accepted. If a command that should succeed returns a different code, check the command syntax and server policies.
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 250: The requested mail action has been completed successfully. This is the most common positive response in SMTP, returned after HELO/EHLO, MAIL FROM, RCPT TO, and DATA completion.
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 250 when after nearly every successful SMTP command — greeting, specifying sender, adding recipients, or completing message delivery. This is the standard success confirmation.
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 250 (OK): No fix needed — the command was accepted. If a command that should succeed returns a different code, check the command syntax and server policies.