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530 FTP response code in Serv-U
This article provides information on 530 FTP response code.
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Overview
A 530 response code can be sent in response to any command that requires a user to log in before the command is processed. It is a permanent negative response, which means the client is discouraged from sending the command again before logging in since the server will respond with the same response code.
Example response
530 Not logged in.
Possible commands
A 530 response code may be sent in response to any command that requires a user to log in before the command is processed. Some servers may reply to all commands with a 530 response code until the client logs in.