I feel like numbers 1, 3, and 4 above are pretty self explanatory while number 2 instantly gives WHAT IN THE JARGON feels.
Before you start to panic sweat… know that the main purpose of these records is simply to verify whether an email is legitimate (and not coming from a sneaky scammer). Here's a breakdown of each to make it a bit more easy peasy:
*DKIM*
DKIM records act as a digital signature in your email header to let providers know the email is actually coming from you and not a spammer. *This one seems to be the most important for this compliance update.*
SPF
SPF records are like a permission slip stating that a sender is aloud to send email on your behalf (think your email account, EMS, LMS, CRM, CMS, etc.).
DMARC
DMARC records give instructions for what to do if an email received fails authentication. It also helps to prevent email spoofing which is when spammers send email that looks like it’s from your domain.
Abbreviations Mentioned Above :
DKIM = DomainKeys Identified Mail
SPF = Sender Policy Framework
DMARC = Domain-based Message Authentication, Reporting, and Conformance
EMS = Email Marketing System
LMS= Learning Management System
CRM = Client Relationship Management
CMS = Content Management System