A carefully tailored SPF record will reduce the likelihood of your domain name getting fraudulently spoofed and keep your messages from getting flagged as spam before they reach your recipients. Email spoofing is the creation of email messages with a forged sender address; something that is simple to do because many mail servers do not perform authentication. Spam and phishing emails typically use such spoofing to mislead the recipient about the origin of the message. A number of measures to address spoofing, however, have developed over the years: SPF, Sender ID, DKIM, and DMARC.