The word SPF means Sender Policy Framework, it is used to help fight against spam, spoofing, and phishing for both email senders and email recipients. It also means email authentication for receiving and sending email legally.
When the newsletter or email sends with SPF identity, it means that email message is sent from the authorized mail server, in order to detect forgery and to prevent spam. It requires for SMTP to have SPF record updates since SMTP does not itself include any authentication mechanisms.
SPF has to be updated through DNS Domain Name System at hosting provider. SPF gives identification that emails are sent by or with the approval of domain administrator.
A policy defining mail servers for sending authorized emails from the domain administrator is SPF.
When an email is received by inbound mail servers, it follows some rules for the bounce (Return-Path) domain in DNS. The inbound mail server compares IP Address of sender with email authorized IP addresses defined in the SPF record. It then decides the rules for accepting or rejecting or flag the email message.
SPF record is updated in TXT record of DNS management panel.
How SPF record looks for Articleonpad.com.com
Articleonpad.com .com TXT “v=spf1 include:myauthorizeddomain.com include:sendingses.com ~all”
Remember with SPF you also have to update your DKIM and DMARC records for sending email newsletters.
If you are sending a promotional or transactional email you need to first identify yourself through SPF record. Once you have updated SPF record, it means you are now authorizing the emails are coming from you and not any other domain user. To achieve maximum inbox delivery you have to update your SPF record in DNS panel.