DNS Record Management (SPF, DKIM, DMARC)

Microsoft 365 (Outlook) DNS Configuration

SPF Record

Host: @
Type: TXT
Value: v=spf1 include:spf.protection.outlook.com ~all
Purpose: Authorizes Microsoft 365 servers to send emails for the domain.

DKIM Records

Host: selector1._domainkey
Type: CNAME
Value: selector1-mastergrowthspace-com._domainkey.kathymaloofzygmunt.n-v1.dkim.mail.microsoft.

Host: selector2._domainkey
Type: CNAME
Value: selector2-mastergrowthspace-com._domainkey.kathymaloofzygmunt.n-v1.dkim.mail.microsoft.

Purpose: Enables DKIM signing for Microsoft 365 emails.

DMARC Record

Host: _dmarc
Type: TXT
Value: v=DMARC1; p=reject; sp=reject; rua=mailto:dmarc1@atomynow.com; ruf=mailto:dmarc1@atomynow.com; adkim=r; aspf=r; fo=1:d:s; pct=100;

Purpose: Defines email authentication policy and reporting settings.

Google Workspace DNS Configuration

SPF Record

Host: @
Type: TXT
Value: v=spf1 include:_spf.google.com ~all

Purpose: Authorizes Google mail servers to send emails.

DKIM Record

Host: google._domainkey
Type: TXT
Value: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQE...

Purpose: Enables DKIM email signing for Google Workspace.

DMARC Record

Host: _dmarc
Type: TXT
Value: v=DMARC1; p=reject; sp=reject; rua=mailto:dmarc8@atomynow.com; ruf=mailto:dmarc8@atomynow.com; adkim=r; aspf=r; fo=1:d:s; pct=100;

Purpose: Controls how failed authentication emails are handled and sends reports.

Quick Technical Difference

Type        Microsoft 365                                              Google Workspace

SPF                include:spf.protection.outlook.com      include:_spf.google.com

DKIM            Uses CNAME selectors                              Uses TXT DKIM key

DMARC        Same format                                              Same format