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Meaning of Mailing Lists Error Codes
Here are the error codes returned when a mailing list cannot be delivered, helping to determine the reason for the failure:
- 4.4.3 CNAME lookup failed temporarily.
- 4.4.7 Problem with a timeout.
- 5.0.0 Address does not exist
- 5.1.0 Other address status
- 5.1.1 Bad destination mailbox address
- 5.1.2 Bad destination system address
- 5.1.3 Bad destination mailbox address syntax
- 5.1.4 Destination mailbox address ambiguous
- 5.1.5 Destination mailbox address valid
- 5.1.6 Mailbox has moved
- 5.1.7 Bad sender's mailbox address syntax
- 5.1.8 Bad sender's system address
- 5.2.0 Other or undefined mailbox status
- 5.2.1 Mailbox disabled, not accepting messages
- 5.2.2 Mailbox full
- 5.2.3 Message length exceeds administrative limit.
- 5.2.4 Mailing list expansion problem
- 5.3.0 Other or undefined mail system status
- 5.3.1 Mail system full
- 5.3.2 System not accepting network messages
- 5.3.3 System not capable of selected features
- 5.3.4 Message too big for system
- 5.4.0 Other or undefined network or routing status
- 5.4.1 No answer from host
- 5.4.2 Bad connection
- 5.4.3 Routing server failure
- 5.4.4 Unable to route
- 5.4.5 Network congestion
- 5.4.6 Routing loop detected
- 5.4.7 Delivery time expired
- 5.5.0 Other or undefined protocol status
- 5.5.1 Invalid command
- 5.5.2 Syntax error
- 5.5.3 Too many recipients
- 5.5.4 Invalid command arguments
- 5.5.5 Wrong protocol version
- 5.6.0 Other or undefined media error
- 5.6.1 Media not supported
- 5.6.2 Conversion required and prohibited
- 5.6.3 Conversion required but not supported
- 5.6.4 Conversion with loss performed
- 5.6.5 Conversion failed
- 5.7.0 Other or undefined security status
- 5.7.1 Delivery not authorized, message refused
- 5.7.2 Mailing list expansion prohibited
- 5.7.3 Security conversion required but not possible
- 5.7.4 Security features not supported
- 5.7.5 Cryptographic failure
- 5.7.6 Cryptographic algorithm not supported
- 5.7.7 Message integrity failure
- 5.7.26 Check your email configuration to pass Gmail's security measures
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