The reason for activating SPF for Infusionsoft is that unless you specify Infusionsoft as your authentic email sending source, SPF verification on the receiver's end will fail. Learn how to configure SPF authentication to ensure email delivery.
Login to your DNS management console
Go to Tools & Settings > DNS Template
You need to edit the DNS TXT record related to SPF
An SPF TXT record for Infusionsoft will have the following syntax:
yourdomain.com TXT v=spf1 include:infusionmail.com -all
Publish this record in your DNS records section for your respective domain.
Note: If you don’t have an existing SPF record for your domain, simply publish the above-mentioned record to enable SPF for outgoing emails using Infusionsoft. If you already have an SPF record in your DNS, you need to change it to include Infusionsoft, as mentioned below:
Previous SPF record: v=spf1 include:spf.zoho.com -all
Modified SPF record: v=spf1 include:spf.zoho.com include:infusionmail.com -all
Save changes
Wait for 24-48 hours to allow your DNS to process the changes