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There's no easy solution for your problem, but you can have a look at the way Mozilla Thunderbird attempts autoconfiguration of a user's email account. Details are here: Most promising is the ISP database they maintain. This database can be queried through a special URL https://...


You can also give the name for MX record as (the period character at the end is required), replace with your primary domain hosted in CPanel.


The owner name is crucially important as it has to match the right-hand-side of the email address. Eg -> look up MX, -> look up MX. If the MX exists at it will only serve any purpose for mail sent to addresses ending with (which I'm guessing is not the ...

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