What is the SPF and why use SPF for your domain?
Sender Policy Framework (SPF) is a method of fighting spam. SPF records are DNS records of your domain telling receiving mail server the list of IP addresses that you allow to send email on behalf of your domain. Having an SPF policy provides an additional trust signal to ISPs so you can increase the likelihood that your emails arrive in the inbox.
How to configure SPF on your domain?
SPF records are normal TXT records in your DNS zone. The easiest way to check your current SPF setting and get the correct value to allow Resales Online servers sending emails under your domains is using the public SPF Suggestion Tools.
Enter your domain into the textbox.
Click the button to check your domain
If your domain need updating, update your DNS zone to include a TXT record whose:
name is the checked domain
value is the string suggested by our tool.
If you have knowledge of DNS and SPF, add this entry to your SPF settings:
DNS changes may take up to 72 hours to take effect.