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Verbiage: Customized email addresses problems (3)

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  • CNAMEs across the board, generally.

    They allow for quick transition/failover times, because they don't have long cache or TTL latencies for propegation. They are a great abstraction of the naming system, that allow for all kinds of monkeying with your name space.

    That said, I usually have them fail as MX in various hosted DNS providers. These usually let you update your zone through a web mechanism, and they will 'lint' the zone information for validity, and reject things that don't parse according to the r

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