4·14 小时前- The domain name has no effect on spam filters, it’s all about which server is sending it and if the domain is properly configured with MX records, DKIM signing keys, etc… A custom domain with mail sent from a major mail provider won’t get sent to spam any more than a new gmail account.
- Mailboxes for a custom domain work exactly the same as any other email. There is no forwarding to another mailbox or provider unless you configure it to be that way. You should be pretty careful with what settings the mail server is configured with though, because encryption is optional…