Adding an SPF record to your DNS can ensure emails you send do not get bounced back or placed in the recipients junk folder. An SPF record is simply a TXT record that confirms which mail servers are authorised to send emails from your domain.
To add an SPF at 20i:
Here's our example:
Resellers can choose to have our SPF record added to all new packages authomatically by checking the box in Account Preferences.