Print Add to Favorites   Back
SMTP Relay codes


Article Information
Article ID: 1
Author: Greg Hedgepath
Created: 5/6/2008
Modified: 5/6/2008
Views: 5,782

SMTP reply codes

See rfc2821 for the basic specification of SMTP; see also rfc1123 for important additional information.

See rfc1893 and rfc2034 for information about enhanced status codes.

Check the RFC index for further mail-related RFCs.

Reply codes in numerical order
Code Meaning
200 (nonstandard success response, see rfc876)
211 System status, or system help reply
214 Help message
220 <domain> Service ready
221 <domain> Service closing transmission channel
250 Requested mail action okay, completed
251 User not local; will forward to <forward-path>
354 Start mail input; end with <CRLF>.<CRLF>
421 <domain> 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 <domain> does not accept mail (see rfc1846)
530 Access denied (???a Sendmailism)
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
554 Transaction failed
Reply codes grouped by command
Command Code Description
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 unrecognised

501 Syntax error in parameters or arguments

504 Command parameter not implemented

421 <domain> Service not available, closing transmission channel
MAIL

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

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 unrecognised

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 unrecognised

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 unrecognised

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 unrecognised

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 unrecognised

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 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
HELP

211 System status, or system help reply

214 Help message

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
NOOP

200 (nonstandard success response, see rfc876)

250 Requested mail action okay, completed

500 Syntax error, command unrecognised

421 <domain> Service not available, closing transmission channel
QUIT

221 <domain> Service closing transmission channel

500 Syntax error, command unrecognised
TURN

250 Requested mail action okay, completed

502 Command not implemented

500 Syntax error, command unrecognised

503 Bad sequence of commands


This URL: http://ahphosting.net/support/Customer/KBArticle.aspx?articleid=1