| HELO <SP> <domain> <CRLF>
| ïÔËÒÙÔØ ÓÅÓÓÉÀ ×ÚÁÉÍÏÄÅÊÓÔ×ÉÑ ÐÏ ÐÒÏÔÏËÏÌÕ SMTP. <domain> - ÄÏÍÅÎÎÏÅ ÉÍÑ ÍÁÛÉÎÙ
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| MAIL <SP> FROM:<reverse-path> <CRLF>
| óÏÏÂÝÉÔØ ÁÄÒÅÓ ÏÔÐÒÁ×ÉÔÅÌÑ (<reverse-path>). ïÂÑÚÁÔÅÌØÎÁÑ ËÏÍÁÎÄÁ, ËÏÔÏÒÕÀ ÎÁÄÏ ×ÙÄÁÔØ ÐÅÒÅÄ ÏÔÐÒÁ×ËÏÊ ÓÏÏÂÝÅÎÉÑ
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| RCPT <SP> TO:<forward-path> <CRLF>
| óÏÏÂÝÉÔØ ÁÄÒÅÓ ÐÏÌÕÞÁÔÅÌÑ (forward-path). ïÂÑÚÁÔÅÌØÎÁÑ ËÏÍÁÎÄÁ, ËÏÔÏÒÕÀ ×ÙÄÁÀÔ ÐÏÓÌÅ MAIL FROM, ÎÏ ÐÅÒÅÄ DATA
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| DATA <CRLF>
| îÁÞÁÔØ ÐÅÒÅÄÁÞÕ ÔÅÌÁ ÐÏÞÔÏ×ÏÇÏ ÓÏÏÂÝÅÎÉÑ. ôÅÌÏ ÓÏÏÂÝÅÎÉÑ ÄÏÌÖÎÏ ËÏÎÞÁÔØÓÑ ÔÏÞËÏÀ(".") × ÐÅÒ×ÏÊ ÐÏÚÉÃÉÉ ÓÔÒÏËÉ
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| RSET <CRLF>
| |
| SEND <SP> FROM:<reverse-path> <CRLF>
| ðÏÓÌÁÔØ ÓÏÏÂÝÅÎÉÅ ÎÁ ÔÅÒÍÉÎÁÌ ÐÏÌØÚÏ×ÁÔÅÌÑ, ËÏÔÏÒÙÊ ÏÐÒÅÄÅÌÑÅÔÓÑ ËÏÍÁÎÄÏÊ RCPT
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| SOML <SP> FROM:<reverse-path> <CRLF>
| SEND OR MAIL. ðÏÓÌÁÔØ × ÐÏÞÔÏ×ÙÊ ÑÝÉË ÉÌÉ ÎÁ ÔÅÒÍÉÎÁÌ ÐÏÌØÚÏ×ÁÔÅÌÑ
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| SAML <SP> FROM:<reverse-path> <CRLF>
| SEND AND MAIL. ðÏÓÌÁÔØ × ÐÏÞÔÏ×ÙÊ ÑÝÉË É ÎÁ ÔÅÒÍÉÎÁÌ ÐÏÌØÚÏ×ÁÔÅÌÑ
|
| VRFY <SP> <string> <CRLF>
| ðÏÌÕÞÉÔØ ÉÎÆÏÒÍÁÃÉÀ Ï ÐÏÌØÚÏ×ÁÔÅÌÅ, ÉÍÑ ËÏÔÏÒÏÇÏ ÕËÁÚÙ×ÁÅÔÓÑ × ËÁÞÅÓÔ×Å ÁÒÇÕÍÅÎÔÁ ËÏÍÁÎÄÙ (<string>)
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| EXPN <SP> <string> <CRLF>
| ðÏÌÕÞÉÔØ ÉÎÆÏÒÍÁÃÉÀ Ï ÐÏÌØÚÏ×ÁÔÅÌÑÈ ÚÁÒÅÇÉÓÔÒÉÒÏ×ÁÎÎÙÈ × ËÁÞÅÓÔ×Å ÐÏÌÕÞÁÔÅÌÅÊ ËÏÒÒÅÓÐÏÎÄÅÎÃÉÉ
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| HELP [<SP> <string>] <CRLF>
| ëÒÁÔËÁÑ ÓÐÒÁ×ËÁ ÐÏ ËÏÍÁÎÄÁÍ ÐÒÏÔÏËÏÌÁ
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| NOOP <CRLF>
| îÅÔ ÏÐÅÒÁÃÉÉ |
| QUIT <CRLF>
| úÁ×ÅÒÛÉÔØ ÓÅÓÓÉÀ |
| TURN <CRLF>
| ðÏÍÅÎÑÔØÓÑ ÍÅÓÔÁÍÉ ÓÅÒ×ÅÒÕ É ËÌÉÅÎÔÕ
|
| 211 | System status, or system help reply
| óÔÁÔÕÓ ÓÉÓÔÅÍÙ ÉÌÉ Help
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| 214 | Help message. [Information on how to use the receiver or the meaning of a particular non-standard command; this reply is useful only to the human user]
| ëÒÁÔËÁÑ ÓÐÒÁ×ËÁ |
| 220 | <domain> Service ready
| SMTP-ÓÅÒ×ÉÓ ÇÏÔÏ× Ë ÒÁÂÏÔÅ
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| 221 | <domain> Service closing transmission channel
| óÅÒ×ÉÓ ÚÁËÒÙÌ ËÁÎÁÌ ÐÅÒÅÄÁÞÉ ÄÁÎÎÙÈ
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| 250 | Requested mail action okay, completed
| óÏÅÄÉÎÅÎÉÅ ÕÓÔÁÎÏ×ÌÅÎÏ
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| 251 | User not local; will forward to <forward-path>
| ðÏÌØÚÏ×ÁÔÅÌØ ÎÅ ÍÅÓÔÎÙÊ. ÷ÙÐÏÌÎÉÔØ ÐÅÒÅÎÁÐÒÁ×ÌÅÎÉÅ ÚÁÐÒÏÓÁ
|
| 354 | Start mail input; end with <CRLF>.<CRLF>
| îÁÞÁÔØ ××ÏÄ ÐÏÞÔÏ×ÏÇÏ ÓÏÏÂÝÅÎÉÑ
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| 421 | <domain> Service not available, closing transmission channel [This may be a reply to any command if the service knows it must shut down]
| óÅÒ×ÉÓ ÏÔÓÕÔÓÔ×ÕÅÔ. ëÁÎÁÌ ÐÅÒÅÄÁÞÉ ÄÁÎÎÙÈ ÚÁËÒÙÔ
|
| 450 | Requested mail action not taken: mailbox unavailable [E.g., mailbox busy]
| îÅÔ ×ÏÚÍÏÖÎÏÓÔÉ ÚÁÐÉÓÁÔØ ÄÁÎÎÙÅ × ÐÏÞÔÏ×ÙÊ ÑÝÉË
|
| 451 | Requested action aborted: local error in processing
| ïÛÉÂËÁ ÐÒÉ ÏÂÒÁÂÏÔËÅ ÚÁÐÒÏÓÁ
|
| 452 | Requested action not taken: insufficient system storage
| úÁÐÒÏÓ ÎÅ ×ÙÐÏÌÎÅÎ ÎÅÄÏÓÔÁÔÏÞÎÏ ÐÁÍÑÔÉ ÎÁ ×ÙÞÉÓÌÉÔÅÌØÎÏÊ ÕÓÔÁÎÏ×ËÅ
|
| 500 | Syntax error, command unrecognized [This may include errors such as command line too long]
| óÉÎÔÁËÓÉÞÅÓËÁÑ ÏÛÉÂËÁ - ÎÅÔ ÔÁËÏÊ ËÏÍÁÎÄÙ
|
| 501 | Syntax error in parameters or arguments
| óÉÎÔÁËÓÉÞÅÓËÁÑ ÏÛÉÂËÁ × ÁÒÇÕÍÅÎÔÁÈ ËÏÍÁÎÄÙ
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| 502 | Command not implemented
| äÁÎÎÁÑ ËÏÍÁÎÄÁ ÎÅ ÍÏÖÅÔ ÂÙÔØ ×ÙÐÏÌÎÅÎÁ
|
| 503 | Bad sequence of commands
| îÅÐÒÁ×ÉÌØÎÁÑ ÐÏÓÌÅÄÏ×ÁÔÅÌØÎÏÓÔØ ËÏÍÁÎÄ
|
| 504 | Command parameter not implemented
| ðÁÒÁÍÅÔÒ ËÏÍÁÎÄÙ ÎÅ ÍÏÖÅÔ ÂÙÔØ ÉÓÐÏÌØÚÏ×ÁÎ × ÄÁÎÎÏÍ ËÏÎÔÅËÓÔÅ
|
| 550 | Requested action not taken: mailbox unavailable [E.g., mailbox not found, no access]
| îÅ ÎÁÊÄÅÎ ÓÏÏÔ×ÅÔÓÔ×ÕÀÝÉÊ ÐÏÞÔÏ×ÙÊ ÑÝÉË
|
| 551 | User not local; please try <forward-path>
| ðÏÌØÚÏ×ÁÔÅÌØ ÎÅ ÎÁÊÄÅÎ ÍÏÖÎÏ ÐÏÐÒÏÂÏ×ÁÔØ ÏÔÐÒÁ×ÉÔØ ÐÏÞÔÕ ÐÏ ÄÒÕÇÏÍÕ ÁÄÒÅÓÕ
|
| 552 | Requested mail action aborted: exceeded storage allocation
| ðÒÅ×ÙÛÅÎÙ Ë×ÏÔÙ ÎÁ ÉÓÐÏÌØÚÏ×ÁÎÉÅ ÒÅÓÕÒÓÏ× ÐÁÍÑÔÉ
|
| 553 | Requested action not taken: mailbox name not allowed [E.g., mailbox syntax incorrect]
| éÍÑ ÐÏÞÔÏ×ÏÇÏ ÑÝÉËÁ ÎÅÐÒÁ×ÉÌØÎÏÅ
|
| 554 | Transaction failed
| ïÂÍÅÎ ÚÁ×ÅÒÛÉÌÓÑ Á×ÁÒÉÊÎÏ
|