When it comes to sending emails in large volume specially in email marketing, everyone is worried about the kind of results they will get. Here we’ll be discussing few important email dns records which are mandatory for your email to cross recipient spam filters.
1. SPF (Sender Policy Framework): An SPF record is nothing but a protocol used to eliminate email forgeries. Its basically a line of code placed under the sender’s domain name server information. Its basically a binding of IP addresses with the sending domain. The incoming mail server can verify a sender by reading its SPF record before accepting the message.
2. DKIM (Domain Keys Identified Mail): Its basically an email validation system to detect email spoofing by providing a mechanism which allow the recipient server to check that incoming mail from a domain is authorized by that domain administrators & also make sure that the email has not been modified during transport. A digital signature also called domain key included in the message can be validated by the recipient server using the public key published in their DNS.
3. DMARC (Domain based message Authentication, Reporting & Conformance): DMARC is another method of email authentication & is commonly used to reduce email abuse. It works on two existing mechanisms i.e SPF & DKIM. It actually co-ordinate their results on the alignment of the domain in the FROM: header field of an email which is often visible to recipients. It allows specification of procedures for handling incoming email based upon the combined results.
4. RDNS (Reverse DNS lookup): Reverse DNS records also plays a vital role in email deliverability. In general computer networks use the Domain Name System to determine the association of IP address with the domain name, this process is also known as forward DNS resolution/lookup. Reverse DNS lookup is the inverse process i.e the resolution of an IP address to its designated domain name.
An email server using all above shared mechanism will be having a better inboxing rate rather than the one avoiding them.