Emails from your company are very important and delicate stuff. They are part of your image, the trustability clients have on you, and therefore, an attractive tool for criminals to get profit through phishing and other illegal activities. Suspicious use of them can be painful for a business and a reason to be banned.
SPF means Sender Policy Framework. This DNS record is in itself a system that validates legitimate emails. SPF record recognizes the mail servers allowed to send emails in your company’s name (domain). It enhances the trustability of your email server while preventing domain spoofing.