The Sender Policy Framework (SPF) record is a DNS record designed to combat and reduce spam for your domain. SPF records help mail servers identify unauthorized use of your domain in the form of forgeries (spoofing). SPF records also help improve your email deliverability rate by preventing the email that you send from landing in a recipient’s spam or junk mail inbox.
To have an SPF record implemented, contact your DNS hosting provider and have them add the following TXT record to your DNS:
Hostname: blank or @
Time to live (TTL): lowest possible
Record type: TXT
Destination: v=spf1 include:emailsrvr.com ~all