SMTP 211 System Status vs 334 Server Challenge
SMTP 211 (System Status) is a 2xx Positive Completion response, while 334 (Server Challenge) is a 3xx Positive Intermediate 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, 334 means that the server is issuing an authentication challenge as part of the SASL authentication exchange. The response contains a Base64-encoded challenge that the client must decode and respond to.
الوصف
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.
متى تراه
When querying the mail server for its status or capabilities. The server is sharing diagnostic or informational details about itself.
كيفية الإصلاح
No fix needed — this is an informational response. If the status indicates a problem, review the server's configuration or contact the mail administrator.
الوصف
The server is issuing an authentication challenge as part of the SASL authentication exchange. The response contains a Base64-encoded challenge that the client must decode and respond to.
متى تراه
During the AUTH command handshake. The server is prompting you for your username or password (Base64-encoded) as part of the multi-step authentication process.
كيفية الإصلاح
Respond with the appropriate Base64-encoded credentials. If authentication keeps failing after responding, verify your credentials and ensure you are using the correct SASL mechanism.
الفروق الرئيسية
211 is a 2xx Positive Completion response, while 334 is a 3xx Positive Intermediate 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 334: The server is issuing an authentication challenge as part of the SASL authentication exchange. The response contains a Base64-encoded challenge that the client must decode and respond to.
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 334 when during the AUTH command handshake. The server is prompting you for your username or password (Base64-encoded) as part of the multi-step authentication process.
متى تستخدم أيًا منهما
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 334 (Server Challenge): Respond with the appropriate Base64-encoded credentials. If authentication keeps failing after responding, verify your credentials and ensure you are using the correct SASL mechanism.