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    s23
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    Simple Mail Transfer Protocol Template loop detected: Template:Stub Related:

    SMTP reply codes[edit]

    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)
    535	SMTP Authentication unsuccessful/Bad username or password
    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
    
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