To ensure emails sent from Delight aren’t blocked by your customers spam filters, and is recognised as legitimate ensure to configure your DNS / Domain.
If you have your own email domain (for example, @tradeservice.com.au, @abcelectrical.com), your domain host or IT administrator needs to set up your Domain Name System (DNS) to list the programs that are authorised to send emails on your behalf.
An SPF record is a powerful anti-abuse tool, that protects you from fraudulent entities disguising their emails as yours. When an email is sent from Delight, the recipient’s spam filter checks if Delight is granted permission to send email from your domain. The server checks the corresponding DNS record to validate this permission. If the DNS is absent, or set up incorrectly, the recipient’s spam filter may reject the incoming email.
You should approach your IT administrator or domain host support to set up your DNS for you.