邮件返回代码

Reply codes in numerical order Code Meaning 200(nonstandard success response, see rfc876)211System status, or system help reply214Help message220<domain> Service ready221<domain> Service closing transmission channel250Requested mail action okay, completed251User not local; will forward to <forward-path>354Start mail input; end with <CRLF>.<CRLF>421<domain> Service not available, closing transmission channel450Requested mail action not taken: mailbox unavailable451Requested action aborted: local error in processing452Requested action not taken: insufficient system storage500Syntax error, command unrecognised501Syntax error in parameters or arguments502Command not implemented503Bad sequence of commands504Command parameter not implemented521<domain> does not accept mail (see rfc1846)530Access denied (???a Sendmailism)550Requested action not taken: mailbox unavailable551User not local; please try <forward-path>552Requested mail action aborted: exceeded storage allocation553Requested action not taken: mailbox name not allowed554Transaction failedReply codes grouped by command Command Code Description connect 220<domain> Service ready 421<domain> Service not available, closing transmission channelHELO 250Requested mail action okay, completed 500Syntax error, command unrecognised 501Syntax error in parameters or arguments 504Command parameter not implemented 521<domain> does not accept mail [rfc1846] 421<domain> Service not available, closing transmission channelEHLO 250Requested mail action okay, completed 550Not implemented 500Syntax error, command unrecognised 501Syntax error in parameters or arguments 504Command parameter not implemented 421<domain> Service not available, closing transmission channelMAIL 250Requested mail action okay, completed 552Requested mail action aborted: exceeded storage allocation 451Requested action aborted: local error in processing 452Requested action not taken: insufficient system storage 500Syntax error, command unrecognised 501Syntax error in parameters or arguments 421<domain> Service not available, closing transmission channelRCPT 250Requested mail action okay, completed 251User not local; will forward to <forward-path> 550Requested action not taken: mailbox unavailable 551User not local; please try <forward-path> 552Requested mail action aborted: exceeded storage allocation 553Requested action not taken: mailbox name not allowed 450Requested mail action not taken: mailbox unavailable 451Requested action aborted: local error in processing 452Requested action not taken: insufficient system storage 500Syntax error, command unrecognised 501Syntax error in parameters or arguments 503Bad sequence of commands 521<domain> does not accept mail [rfc1846] 421<domain> Service not available, closing transmission channelDATA 354Start mail input; end with <CRLF>.<CRLF> 451Requested action aborted: local error in processing 554Transaction failed 500Syntax error, command unrecognised 501Syntax error in parameters or arguments 503Bad sequence of commands 421<domain> Service not available, closing transmission channelreceived data 250Requested mail action okay, completed 552Requested mail action aborted: exceeded storage allocation 554Transaction failed 451Requested action aborted: local error in processing 452Requested action not taken: insufficient system storageRSET 200(nonstandard success response, see rfc876) 250Requested mail action okay, completed 500Syntax error, command unrecognised 501Syntax error in parameters or arguments 504Command parameter not implemented 421<domain> Service not available, closing transmission channelSEND 250Requested mail action okay, completed 552Requested mail action aborted: exceeded storage allocation 451Requested action aborted: local error in processing 452Requested action not taken: insufficient system storage 500Syntax error, command unrecognised 501Syntax error in parameters or arguments 502Command not implemented 421<domain> Service not available, closing transmission channelSOML 250Requested mail action okay, completed 552Requested mail action aborted: exceeded storage allocation 451Requested action aborted: local error in processing 452Requested action not taken: insufficient system storage 500Syntax error, command unrecognised 501Syntax error in parameters or arguments 502Command not implemented 421<domain> Service not available, closing transmission channelSAML 250Requested mail action okay, completed 552Requested mail action aborted: exceeded storage allocation 451Requested action aborted: local error in processing 452Requested action not taken: insufficient system storage 500Syntax error, command unrecognised 501Syntax error in parameters or arguments 502Command not implemented 421<domain> Service not available, closing transmission channelVRFY 250Requested mail action okay, completed 251User not local; will forward to <forward-path> 550Requested action not taken: mailbox unavailable 551User not local; please try <forward-path> 553Requested action not taken: mailbox name not allowed 500Syntax error, command unrecognised 501Syntax error in parameters or arguments 502Command not implemented 504Command parameter not implemented 421<domain> Service not available, closing transmission channelEXPN 250Requested mail action okay, completed 550Requested action not taken: mailbox unavailable 500Syntax error, command unrecognised 501Syntax error in parameters or arguments 502Command not implemented 504Command parameter not implemented 421<domain> Service not available, closing transmission channelHELP 211System status, or system help reply 214Help message 500Syntax error, command unrecognised 501Syntax error in parameters or arguments 502Command not implemented 504Command parameter not implemented 421<domain> Service not available, closing transmission channelNOOP 200(nonstandard success response, see rfc876) 250Requested mail action okay, completed 500Syntax error, command unrecognised 421<domain> Service not available, closing transmission channelQUIT 221<domain> Service closing transmission channel 500Syntax error, command unrecognisedTURN 250Requested mail action okay, completed 502Command not implemented 500Syntax error, command unrecognised 503Bad sequence of commands