Should I use my own domain in my proton mail?



  • Using my own domain on Proton Mail is cool, but what if someone hack my namecheap account? What if some government orders that my domain is redirected?

    Should I use @protonmail instead of @mydomain? What are the implications?



  • Receiving mail is done by the recipients mail server looking up the DNS MX record. If someone can change the MX record of your domain it can thus cause mails to you to be directed to a different mail server (likely in the attackers control). Since Proton Mail is thus not involved in these mails it also cannot protect these.

    The security of the already received mails is not changed though and also not the security of the sent mails. If DNS settings like SPF are changed it might be though that recipients will consider mails send with your domain as sender as spam, since they came from an unexpected IP address.


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