Security risk of using own domain for email

Hi all, I tried looking online but couldn't find clear answer so I decided to ask here. I want to use an email adress for sending invitation, which means it will contain personal data. I would like it if the email adress was linked to my own domain instead of my provider. The email address itself is hosted at my provider though (the provider is similar to proton in terms of security and privacy). Does it matter for the security …

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