Porkbun is a domain registar and DNS mangement site. We use porbun for our custom emails like this one --> support@cursedbots.xyz.
Wr use porkbun for our .xyz domain. They are reasonably priced and great customer support. Emails through the custom domain work quickly and seamlessly allowing us to use them for anything. You can use your custom email through Gmail and porkbuns webmail site when on PC.
You can also use the smtp server for sending email through a contact form with php.
You can check out porkbun with our link below