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NOVOTS KMS .: ʼ/Ⱥ .: "MTA""e`?Ϣa"

"MTA""e`?Ϣa"

1. ʲN MTA
MTAMail Transfer Agent ]ʹɡ]ŷ MTA ɫؓ؟ MUA (]ʹô Outlook Express ]հlܛw)żՈ󣬌]?һ MTA ( ]ŷ )һ MTA]ŷˣεfMTA e`?Ϣa]( ]ŷ )?֪Ųɹcԭ

MTA e`aıFʽ 550 5.1.1 Ƀɴ󲿷ݽMɣSMTP acDSN aMɡ 550 5.1.1 550 SMTP a 5.1.1 DSN aSMTP a̶λ֣ DSN a̶Сc_֡

ŒքeMһfSMTP acDSN a

2. ʲN SMTP a

SMTP Simple Mail Transfer Protocol ĺlc]ŷg Internet E-Mail ͨ?f

SMTP һM̶Ļؑaʾ]ŷ춂]ҪĻؑr 421450451452550551552553554 9 MaʾҪ]ŷеĄɹ(һ) x SMTP e`]ʧe`?Ϣa

3. ʲN DSN e`a
DSN Delivery Status Notification ĺ]fB֪ͨ a.b.c ʽMɣքe]ǷfɹʧԭԼMһԔ顣

MTA e`a 550 5.1.1

λ
a
b
c


5
1
1

f
a λֻܳFN 24 5

2
ʾ?Ϣfͳɹ

4
rfɹ]ŷÿ 15 犌ԇһΣLԇ 5 Ըʧ˻ؽoļߡ

5



1-7 ߷Nܔ֣քeͬ?eĆ}

1
]ַ (Address)

2
ռ (Mailbox)

3
Ŀĵ]ϵy (Mail System)

4
]ϵyW·c· (Network and Routing)

5
]ͅf (Mail Delivery Protocol)

6
]ݻý(Message Content or Media)

7
ȫ]OҎt(Security or Policy)


b λõĔ֣Mһ]Ͳɹԭ


() Ԕ DSN e`axϱ () ҂֪ 550 5.1.1 ]ʧŷoмļҪfńԭ]ռַe`]˻ؽoļߡֵעǣһֻڡrofcʧrŕ֪ͨļߡֻ핺rʧጢԇ 4.X.X c̈́ʧŷ͵ 5.X.X ?a


IW·ϵyߣTƼhľugͨՈʹÿյ˼rA˼żе MTA e`aһ?֪ϵyߣԱϵyߞʹж]fʧԭ?Kʹ߽y̎톖}

(һ) SMTP a

a
x

421
Service not available, closing transmission channel
̖ȵCoṩգP]͹ܵ]C

450
Requested mail action not taken: mailbox unavailable
Ҫ]oУ]oṩգ]C

451
Requested action aborted: local error in processing
ҪДࣺضe`

452
Requested action not taken: insufficient system storage
ҪoУϵyg

550
Requested action not taken: mailbox unavailable
ҪoУ䲻ڣ]˻ؽoļ

551
User not local; please try
]ŷ֪ʹ߲춱ضˣLԇ̖ȵD·?

552
Requested mail action aborted: exceeded storage allocation
ҪĄДࣺăg]˻ؽoļ

553
Requested action not taken: mailbox name not allowed
ҪĄδУ䲻Sԓ

554
Transaction failed
ʧ



() DSN e`a

ע헣һԪ 4 5
4.X.X 핺re`]ŷԇ
5.X.X ]ʧ

?e
a
x


X.1.X ʾ]ַ(Address)}
X.1.0
Other address status
]ַ}

X.1.1
Bad destination mailbox address
ռַe`

X.1.2
Bad destination system address
ռַϵye`

X.1.3
Bad destination mailbox address syntax
ռַ䷨e`

X.1.4
Destination mailbox address ambiguous
ռַ䲻

X .1.5
Destination mailbox address valid
ռַoЧ

X.1.6
Mailbox has moved
Ƴ

X.1.7
Bad sender's mailbox address syntax
ļ䷨e`

X.1.8
Bad sender's system address
ļϵye`

X.2.X ʾռ(Mailbox)}
X.2.0
Other or undefined mailbox status
δxռ䆖}

X.2.1
Mailbox disabled, not accepting messages
o\oż

X.2.2
Mailbox full
?M

X.2.3
Message length exceeds administrative limit.
]Lȳ

X.2.4
Mailing list expansion problem
ض]ȺMȺMo_չ

X.3.X ʾĿĵ]ϵy(Mail System)}
X.3.0
Other or undefined mail system status
δx]ϵy}

X.3.1
Mail system full
]ϵyg?M

X.3.2
System not accepting network messages
CożܕrPCS޵

X.3.3
System not capable of selected features
ָ]oռC

X.3.4
Message too big for system
]С]ϵy

X.3.5
System incorrectly configured
ϵyOe`o]

X.4.X ʾ]ϵyW·c·(Network and Routing)}
X.4.0
Other or undefined network or routing status
δxľW·c·]O}

X.4.1
No answer from host
Coؑ

X.4.2
Bad connection
Be`

X.4.3
Directory server failure
W·ϵyoD]oBDNSŷ

X.4.4
Unable to route
]ϵy·Y?㣬oQ·

X.4.5
Network congestion


X.4.6
Routing loop detected
]e`·Ovжo

X.4.7
Delivery time expired
]C^

X.5.X
ʾ]ͅf} (Mail Delivery Protocol)}Ǽļŷǂ]ϵyĆ}
X.5.0
Other or undefined protocol status
δxͨ?f}

X.5.1
Invalid command


X.5.2
Syntax error
]ͅfľ䷨e`

X.5.3
Too many recipients
̫ռ

X.5.4
Invalid command arguments
e`

X.5.5
Wrong protocol version
e`ͨ?f汾

X.6.X
ʾ]ݻý(Message Content or Media)Ć}ռcļp֧Ԯͬӵă?e(Content Type)
X.6.0
Other or undefined media error
δxý醖}

X.6.1
Media not supported
ͅfD]ϵy֧Ԯԓý

X.6.2
Conversion required and prohibited
]ڂ֮ǰ轛^DQԓS

X.6.3
Conversion required but not supported
]D֮ǰ횽^DQo

X.6.4
Conversion with loss performed
]ͳɹ݃oDQzʧ

X.6.5
Conversion failed
DQʧ

X.7.X ʾȫ]OҎt(Security or Policy) Ć}
X.7.0
Other or undefined security status
ȫ]OҎt}

X.7.1
Delivery not authorized, message refused
ļߟoڙż

X.7.2
Mailing list expansion prohibited
ļߟoڙԓ]ȺM

X.7.3
Security conversion required but not possible
]ȫf

X.7.4
Security features not supported
]аȫJCʩͅf

X.7.5
Cryptographic failure
ڙJCԓ]ϵyoԓY?ȫ

X.7.6
Cryptographic algorithm not supported
ڙJCԓ]ϵyoԓ㷨֧Ԯ

X.7.7
Message integrity failure
ڙJCԓ]ϵyoԓ]ѓp

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