E-Mails

[adisp007]

@katufo

I’m using gmail, maybe you can only edit the primary email into custom email domain using outlook. And that’s bad for google user.

You can change sender email from GMail.

Send emails from a different address or alias - Gmail Help

@Technical.Legendz

… but most things get sent to the spam folder.

Because you didn’t setup SPF & DKIM DNS records.
You must setup those so your email (from your custom domain) surely won’t enter spam folder.
But you must use advanced DNS system that support TXT record to setup it (such as Cloudflare,etc.).
SPF: Yandex 360 for Business - Yandex 360 for Business. Help
DKIM: Yandex 360 for Business - Yandex 360 for Business. Help

[XInterverse]

I mean the messages I get, goes to the spam folder.

[Admin]

If your email provider blocks certain messages from reaching you, or marks them as spam, that’s something only your email provider can fix. The only thing you as a domain owner can configure is which email provider receives email for your domain. If your email provider then discards the messages, you may need to find a different email provider.