I do not understand our current Postfix installation.  How can I upgrade
or install PostConf on our live server without risking lost email?

    Since text configuration files can become complex, especially after a
    few years and multiple admins, PostConf offers consulting services for
    all degrees of complexity and any number of servers, users, domains,
    and networks.

    We can also run pilot upgrades on our servers, to test a configuration
    before putting it into production.

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