To establish which mail servers have permission to send mail on behalf of your domain, you need to have what is called an SPF record.
First, go to: http://www.anti-spamtools.org/ and use the Online Wizard (we’ve found this to be the best way) and you should get something like below: Example: v=spf1 a mx ptr ip4:126.96.36.199 mx:mail.scarletts-web.com ip4:188.8.131.52 -all
Then go to SiteWorx > Domains > DNS Records > and click View Records next to the domain.com.
Add a TXT record and paste what you copied into the Text field.
Scarlett’s Web, Inc. leverages diverse technical talent and experience to produce website design solutions that integrate into your information and technological needs.We provide our clients with a website development partner that can make strategic recommendations, visually design, create, and manage custom web development products, e-commerce design, provide shared and dedicated hosting, graphic design, multimedia, and support solutions to solve core business challenges.