SMTP: chybové kódy

• 211 System status, or system help reply

• 214 Help message

• 220 <domain> Service ready

• 221 <domain> Service closing transmission channel

• 250 Requested mail action okay, completed

• 251 User not local; will forward to <forward-path>

• 252 Cannot VRFY user, but will accept message and attempt delivery

• 354 Start mail input; end with <CRLF>.<CRLF>

• 421 <domain> Service not available, closing transmission channel

• 450 Requested mail action not taken: mailbox unavailable (e.g., mailbox busy)

• 451 Requested action aborted: local error in processing

• 452 Requested action not taken: insufficient system storage