SPF, DKIM and DMARC are DNS records that prove email from your domain is legitimate. Without them, messages land in spam more often and fraudsters can spoof your address more easily.
SPF lists the servers allowed to send email for the domain; DKIM adds a digital signature to messages; DMARC sets the checking policy and sends reports.
Major mailbox providers check these records increasingly strictly, especially for companies that send newsletters. We set them up together with domain email.
Need help? Nik.Ru specialists will set everything up for you: send an enquiry or ask the consultant.