
Zero Bounce Service



From the results, I was able to import
- valid
https://mailchimp.com/help/about-omnivore/
https://www.zerobounce.net/mailchimp-omnivore/

5.X BOUNCE CODES (PERMANENT FAILURES)
- CodeDescription
- 5.0.0Address does not exist
- 5.1.0Other address status
- 5.1.1Bad destination mailbox address
- 5.1.2Bad destination system address
- 5.1.3Bad destination mailbox address syntax
- 5.1.4Destination mailbox address ambiguous
- 5.1.5Destination mailbox address valid
- 5.1.6Mailbox has moved
- 5.1.7Bad sender’s mailbox address syntax
- 5.1.8Bad sender’s system address
- 5.2.0Other or undefined mailbox status
- 5.2.1Mailbox disabled, not accepting messages
- 5.2.2Mailbox full
- 5.2.3Message length exceeds administrative limit.
- 5.2.4Mailing list expansion problem
- 5.3.0Other or undefined mail system status
- 5.3.1Mail system full
- 5.3.2System not accepting network messages
- 5.3.3System not capable of selected features
- 5.3.4Message too big for system
- 5.4.0Other or undefined network or routing status
- 5.4.1No answer from host – the address is invalid
- 5.4.2Bad connection
- 5.4.3Routing server failure
- 5.4.4Unable to route
- 5.4.5Network congestion
- 5.4.6Routing loop detected
- 5.4.7Delivery time expired
- 5.5.0Other or undefined protocol status
- 5.5.1Invalid command
- 5.5.2Syntax error
- 5.5.3Too many recipients
- 5.5.4Invalid command arguments
- 5.5.5Wrong protocol version
- 5.6.0Other or undefined media error
- 5.6.1Media not supported
- 5.6.2Conversion required and prohibited
- 5.6.3Conversion required but not supported
- 5.6.4Conversion with loss performed
- 5.6.5Conversion failed
- 5.7.0Other or undefined security status
- 5.7.1Delivery not authorized, message refused
- 5.7.2Mailing list expansion prohibited
- 5.7.3Security conversion required but not possible
- 5.7.4Security features not supported
- 5.7.5Cryptographic failure
- 5.7.6Cryptographic algorithm not supported
- 5.7.7Message integrity failure
4.X BOUNCE CODES (TEMPORARY FAILURES)
- CodeDescription
- 421service not available, closing transmission channel
- 450Requested mail action not taken: mailbox unavailable (e.g., mailbox busy)
- 451Requested action aborted: error in processing
- 452Requested action not taken: insufficient system storage