530 User not logged in.

500 Syntax error, command unrecognized. This may include errors such as command line too long.

501 Syntax error in parameters or arguments.

212 Directory status.

213 File status.

214 Help message.

552 Requested file action aborted, storage allocation exceeded

553 Requested action not taken. Illegal file name.

215 NAME system type. (NAME is an official system name from the list in the Assigned Numbers document.)

220 Service ready for new user.

221 Service closing control connection. (Logged out if appropriate.)

225 Data connection open, no transfer in progress.

226 Closing data connection. Re

502 Command not implemented.

503 Bad sequence of commands.