Without these records you're a lot more likely to go to spam, or get rejected outright. If you have questions about it, ask here or DM me and I'll be glad to help.
Recently I added a custom domain to my protonmail account and during the procedure it makes you do this steps (adding SPD, DKIM and DMARC) to pass all the steps. They tell you exactly what records you have to add, where to add them and what the content should be. These guys are great
Yep, setup mine about a year ago now, since I'm trying to get rid of Google completely, and it walks you through all of this. It was really well done setup.
Same with Tuta, which I did last weekend. Still evaluating the service for now before telling everyone to switch to my new custom domain (I'm forwarding everything from my old domain for now).
I tried Tuta when it was still called Tutanota, but it was rather cumbersome to use. The mobile and desktop app would work reasonably well, but searching through your emails was a pain.
It also wasn't possible to use any email client on the pc. Proton also doesn't offer IMAP access, but they do have a bridge you can install for that, enabling the use of almost any mail client.
Yeah, searching on Tuta sucks because it has to be done client-side since everything is encrypted on the server. With ProtonMail, the subject line is unencrypted, so it can search that without your key.
And I thought I'd care about email clients, but I honestly really don't. They're just so heavy and I don't use email enough to need power user features.
I used Proton for a couple years and it was good, but decided on Tuta because Proton raised their prices and I honestly don't need the rest of their stuff.
In that case it sounds like Tuta is the right choice for you. I just wanted to make sure you knew about the drawbacks. For me the search thing is what killed it, because I regularly search older emails.
All domains you purchase through cloudflare have a fancy button on the gui to add dmarc and dkim that just say “reject” so people can’t pretend to email from your domain, pretty neat feature imo. (Not actually useful if you are trying to use it as a custom email domain though, lol)