SMTP 214 Help Message vs 452 Insufficient Storage
SMTP 214 (Help Message) is a 2xx Positive Completion response, while 452 (Insufficient Storage) is a 4xx Transient Negative response. 214 indicates that a help message response containing information about the server's supported commands or a specific command's usage. This is a human-readable reply to the HELP command. In contrast, 452 means that the requested action was not taken because the server has insufficient system storage. The server cannot accept more mail until storage is freed.
説明
A help message response containing information about the server's supported commands or a specific command's usage. This is a human-readable reply to the HELP command.
このコードが表示される場合
After sending the HELP command to the SMTP server. The response lists available commands or provides usage details for the command you specified.
解決方法
No fix needed — this is a normal informational response. Use the provided help text to understand which commands the server supports.
説明
The requested action was not taken because the server has insufficient system storage. The server cannot accept more mail until storage is freed.
このコードが表示される場合
When the mail server's disk is full or the recipient's mailbox has exceeded its storage quota. The server cannot store additional messages.
解決方法
If you are the sender, retry later after the recipient frees up space. If you manage the server, clear disk space, increase quotas, or archive old messages.
主な違い
214 is a 2xx Positive Completion response, while 452 is a 4xx Transient Negative response.
SMTP 214: A help message response containing information about the server's supported commands or a specific command's usage. This is a human-readable reply to the HELP command.
SMTP 452: The requested action was not taken because the server has insufficient system storage. The server cannot accept more mail until storage is freed.
You encounter 214 when after sending the HELP command to the SMTP server. The response lists available commands or provides usage details for the command you specified.
You encounter 452 when when the mail server's disk is full or the recipient's mailbox has exceeded its storage quota. The server cannot store additional messages.
どちらをいつ使うか
For 214 (Help Message): No fix needed — this is a normal informational response. Use the provided help text to understand which commands the server supports. For 452 (Insufficient Storage): If you are the sender, retry later after the recipient frees up space. If you manage the server, clear disk space, increase quotas, or archive old messages.