SMTP: chybové kódy

• 500 Syntax error, command unrecognized

• 501 Syntax error in parameters or arguments

• 502 Command not implemented (see section 4.2.4)

• 503 Bad sequence of commands

• 504 Command parameter not implemented

• 550 Requested action not taken: mailbox unavailable

• 551 User not local; please try <forward-path>

• 552 Requested mail action aborted: exceeded storage allocation

• 553 Requested action not taken: mailbox name not allowed

• 554 Transaction failed