This is an old revision of the document!
Here is a list of possible "Reply codes" grouped by command
connect
- 220 domain Service ready
- 421 domain Service not available, closing transmission channel
HELO
- 250 Requested mail action okay, completed
- 500 Syntax error, command unrecognised
- 501 Syntax error in parameters or arguments
- 504 Command parameter not implemented
- 521 <domain> does not accept mail [rfc1846]
- 421 <domain> Service not available, closing transmission channel
EHLO
- 250 Requested mail action okay, completed
- 550 Not implemented
- 500 Syntax error, command unrecognized
- 501 Syntax error in parameters or arguments
- 504 Command parameter not implemented
- 421 <domain> Service not available, closing transmission channel
- 250 Requested mail action okay, completed
- 552 Requested mail action aborted: exceeded storage allocation
- 451 Requested action aborted: local error in processing
- 452 Requested action not taken: insufficient system storage
- 500 Syntax error, command unrecognized
- 501 Syntax error in parameters or arguments
- 421 <domain> Service not available, closing transmission channel
- RCPT
250 Requested mail action okay, completed 251 User not local; will forward to <forward-path> 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 450 Requested mail action not taken: mailbox unavailable 451 Requested action aborted: local error in processing 452 Requested action not taken: insufficient system storage 500 Syntax error, command unrecognized 501 Syntax error in parameters or arguments 503 Bad sequence of commands 521 <domain> does not accept mail [rfc1846] 421 <domain> Service not available, closing transmission channel
- DATA
354 Start mail input; end with <CRLF>.<CRLF> 451 Requested action aborted: local error in processing 554 Transaction failed 500 Syntax error, command unrecognized 501 Syntax error in parameters or arguments 503 Bad sequence of commands 421 <domain> Service not available, closing transmission channel
- received data
250 Requested mail action okay, completed 552 Requested mail action aborted: exceeded storage allocation 554 Transaction failed 451 Requested action aborted: local error in processing 452 Requested action not taken: insufficient system storage
- RSET
200 (nonstandard success response, see rfc876) 250 Requested mail action okay, completed 500 Syntax error, command unrecognized 501 Syntax error in parameters or arguments 504 Command parameter not implemented 421 <domain> Service not available, closing transmission channel
- SEND
250 Requested mail action okay, completed 552 Requested mail action aborted: exceeded storage allocation 451 Requested action aborted: local error in processing 452 Requested action not taken: insufficient system storage 500 Syntax error, command unrecognized 501 Syntax error in parameters or arguments 502 Command not implemented 421 <domain> Service not available, closing transmission channel
- SOML
250 Requested mail action okay, completed 552 Requested mail action aborted: exceeded storage allocation 451 Requested action aborted: local error in processing 452 Requested action not taken: insufficient system storage 500 Syntax error, command unrecognized 501 Syntax error in parameters or arguments 502 Command not implemented 421 <domain> Service not available, closing transmission channel
- SAML
250 Requested mail action okay, completed 552 Requested mail action aborted: exceeded storage allocation 451 Requested action aborted: local error in processing 452 Requested action not taken: insufficient system storage 500 Syntax error, command unrecognised 501 Syntax error in parameters or arguments 502 Command not implemented 421 <domain> Service not available, closing transmission channel
- VRFY
250 Requested mail action okay, completed 251 User not local; will forward to <forward-path> 550 Requested action not taken: mailbox unavailable 551 User not local; please try <forward-path> 553 Requested action not taken: mailbox name not allowed 500 Syntax error, command unrecognised 501 Syntax error in parameters or arguments 502 Command not implemented 504 Command parameter not implemented 421 <domain> Service not available, closing transmission channel
- EXPN
250 Requested mail action okay, completed 550 Requested action not taken: mailbox unavailable 500 Syntax error, command unrecognized 501 Syntax error in parameters or arguments 502 Command not implemented 504 Command parameter not implemented 421 <domain> Service not available, closing transmission channel
- HELP
211 System status, or system help reply 214 Help message 500 Syntax error, command unrecognized 501 Syntax error in parameters or arguments 502 Command not implemented 504 Command parameter not implemented 421 <domain> Service not available, closing transmission channel
- NOOP
200 (nonstandard success response, see rfc876) 250 Requested mail action okay, completed 500 Syntax error, command unrecognized 421 <domain> Service not available, closing transmission channel
- QUIT
221 <domain> Service closing transmission channel 500 Syntax error, command unrecognized
- TURN
250 Requested mail action okay, completed 502 Command not implemented 500 Syntax error, command unrecognized 503 Bad sequence of commands