| 200 - |
(nonstandard success response, see rfc876) |
| 211 - |
System status, or system help reply |
| 214 - |
Help message |
| 220 - |
SMTP Service ready |
| 221 - |
Service closing transmission channel |
| 250 - |
Requested mail action okay, completed |
| 251 - |
The recipient is not local to the server, but the server will accept and forward the message. |
| 252 - |
The recipient cannot be VRFYed, but the server accepts the message and attempts delivery. |
| 354 - |
Start mail input; end with <CRLF>.<CRLF> |
| 421 - |
Service not available, closing transmission channel |
| 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 unrecognised |
| 501 - |
Syntax error in parameters or arguments |
| 502 - |
Command not implemented |
| 503 - |
Bad sequence of commands |
| 504 - |
Command parameter not implemented |
| 521 - |
Server does not accept mail |
| 530 - |
Access denied |
| 550 - |
Requested action not taken: mailbox unavailable |
| 551 - |
User not local; please try forward address |
| 552 - |
Requested mail action aborted: exceeded storage allocation |
| 553 - |
Requested action not taken: mailbox name not allowed |
| 554 - |
Transaction failed |
