SPF is an email authentication mechanism published in the DNS records of a sending domain.
It shows a list (called SPF record) of authorized IPs that can use this domain to send emails. As this list is public, the receiving server will be able to compare it with the IP of the incoming email.
SPF, just like DMARC and DKIM, is a security layer to ensure email safety.
As for any email security protocols, having an SPF properly set improves the deliverability of emails sent from this domain.
Everything you need to know about email deliverability to make sure that your emails reach the inbox and never land in spam. More than 30 emails key points analyzed, including practical guides and relevant tools to use to maximize your email deliverability and increase the ROI of your emailing campaigns.
Spam filters are using keyword detection to spot junk emails and make sure your inbox stays clean. This is why you should choose carefully the words used in the subject and body of your emails. Here's is the ultimate list of spam-trigger keyword that you should ban from your email content in 2021!