If you’re willing to run “mail-in-a-box”, with full control of the DNS for your domain name, it sets up all of the security DNS records to not get flagged as spam.
If you’re unwilling or unable to let mail-in-a-box control the full DNS for your domain, mail-in-a-box still has a page that will list every DNS record that needs add to your un-self-hosted DNS. It is many many DNS records, for best spam protection.
My other concern was receiving spam.
But the default spam filter in mail-in-a-box felt immediately noticeably (but just anecdotally) better than the one built into Proton. Which surprised me. I had assumed that I would give up some spam filter quality by self-hosting.
If you’re willing to run “mail-in-a-box”, with full control of the DNS for your domain name, it sets up all of the security DNS records to not get flagged as spam.
If you’re unwilling or unable to let mail-in-a-box control the full DNS for your domain, mail-in-a-box still has a page that will list every DNS record that needs add to your un-self-hosted DNS. It is many many DNS records, for best spam protection.
My other concern was receiving spam.
But the default spam filter in mail-in-a-box felt immediately noticeably (but just anecdotally) better than the one built into Proton. Which surprised me. I had assumed that I would give up some spam filter quality by self-hosting.