DNS Entries - Must have!
For "customerdomain.com" (Replace with your domain):
- CNAME (New entry)
smart.customerdomain.com POINTS TO whs.sendergen.com
- SPF TXT (Modification to existing DNS entry)
*The underscore is IMPORTANT! **This include statement needs to be added to your existing SPF TXT record
Splitting a long SPF TXT record