The first item on your cold email deliverability checklist is to establish your sender reputation. The main thing here is to gain trust and respectability through SPF, DKIM, and DMARC.
A first step in the right direction to optimize cold email deliverability is to ensure that SPF authentication methods are used. Sender Policy Framework (SPF) allows domain owners to specify a list of IP addresses and domains permitted to send emails on behalf of that domain.
Correct SPF configuration allows email recipients to trust that illegitimate messages will be sent to quarantine or reject status, thus allowing legitimate messages to be delivered as intended.
By including a signature in every outgoing email, DKIM (DomainKeys Identified Mail) works with SPF to confirm that the sender is responsible for the content. Prospects are more trusting when they see that your business digitally signs its emails, enhancing your company's reputation.
The more your emails are checked and successfully verified, the higher your cold emails will be rated.DMARC
(Domain-based Message Authentication, Reporting, and Conformance) provides information about the message to recipients so that senders can understand what recipients see.
It allows you to view and decode the data sent from recipients so that you can see what customers see when your company's emails are delivered to their inboxes.
The use of DMARC is a crucial part of improving sender reputation implementation. You can deter email abuse like spam, phishing, and spoofing the best if you use all three approaches: DMARC, SPF, and DKMI.