Knowledgebase: Mail Errors
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Common SMTP return Codes
Posted by David Rutherford on 12 August 2013 12:39 PM
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Following are some of the commonly seen SMTP return codes. 211 System status, or system help reply 214 Help message 220 <domain> Service ready 221 <domain> Service closing transmission channel 421 <domain> Service not available, 250 Requested mail action okay, completed 251 User not local; will forward to <forward-path> 252 Cannot VRFY user (e.g. info is not local). but will take message for this users and attempt delivery 450 Requested mail action not taken: mailbox unavailable (e.g. mailbox busy) 550 Requested action not taken: mailbox unavailable (e.g. mailbox not found or no access) 451 Requested action aborted: error in processing 551 User not local; please try <forward-path> 452 Requested action not taken: insufficient system storage 552 Requested mail action aborted: exceeded storage allocation 553 Requested action not taken: mailbox name not allowed (e.g. mailbox syntax incorrect) 354 Start mail input; end with <CRLF>.<CRLF> 554 Transaction failed | |
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