Email Deliverability & DNS Studio (SPF, DKIM, DMARC)

Generate and validate DMARC, SPF, and DKIM DNS TXT records with RFC 7208 lookup counting and bulk sender compliance

Authentication Presets

Load recommended email infrastructure setups

Domain & Security Policy

Configure DMARC, SPF, and DKIM record parameters

Sending Domain:

DMARC Configuration

DMARC Policy (p=):

Aggregate Reports Email (rua=):

SPF Configuration

2 / 10 DNS Lookups

SPF Includes (RFC 7208) (comma-separated):

All Mechanism Qualifier:

include mx

DKIM Configuration

DKIM Selector:

Public Key (base64):

Google & Yahoo Bulk Sender Compliance

Compliant

•DMARC policy "quarantine" enforces strong sender protection.

•SPF DNS lookups within limits (2/10 allowed).

•DKIM public key is configured.

DMARC Record (_dmarc.mycompany.io)

v=DMARC1; p=quarantine; rua=mailto:dmarc-reports@mycompany.io

SPF Record (mycompany.io)

v=spf1 include:_spf.google.com include:resend.com ~all

DKIM Record (resend._domainkey.mycompany.io)

v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC3QVRnpxWwK...sample_key

# Cloudflare / Route 53 DNS TXT Records
Type: TXT | Name: _dmarc | Content: v=DMARC1; p=quarantine; rua=mailto:dmarc-reports@mycompany.io
Type: TXT | Name: @      | Content: v=spf1 include:_spf.google.com include:resend.com ~all
Type: TXT | Name: resend._domainkey | Content: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC3QVRnpxWwK...sample_key

; DNS Zone file for mycompany.io
_dmarc.mycompany.io.   IN  TXT "v=DMARC1; p=quarantine; rua=mailto:dmarc-reports@mycompany.io"
mycompany.io.          IN  TXT "v=spf1 include:_spf.google.com include:resend.com ~all"
resend._domainkey.mycompany.io. IN TXT "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC3QVRnpxWwK...sample_key"

# Cloudflare / Route 53 DNS TXT Records Type: TXT | Name: _dmarc | Content: v=DMARC1; p=quarantine; rua=mailto:dmarc-reports@mycompany.io Type: TXT | Name: @ | Content: v=spf1 include:_spf.google.com include:resend.com ~all Type: TXT | Name: resend._domainkey | Content: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC3QVRnpxWwK...sample_key

; DNS Zone file for mycompany.io _dmarc.mycompany.io. IN TXT "v=DMARC1; p=quarantine; rua=mailto:dmarc-reports@mycompany.io" mycompany.io. IN TXT "v=spf1 include:_spf.google.com include:resend.com ~all" resend._domainkey.mycompany.io. IN TXT "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC3QVRnpxWwK...sample_key"