Zero-DB Email Deliverability Architecture
Email Service Provider (ESP) DNS Authentication Guides
Eliminate deliverability failures, authenticate domain sending identities, and stay strictly beneath the RFC 7208 10-lookup limit with verified DNS record setup guides for every major email provider.
Verified ESP DNS Configurations (20)
Top Delivery ProvidersCNAME DKIM1 Lookup
Twilio SendGrid
SPF: include:sendgrid.net
DKIM: s1._domainkey
BIMI: SupportedView Guide
TXT DKIM1 Lookup
Mailgun by Sinch
SPF: include:mailgun.org
DKIM: k1._domainkey
BIMI: SupportedView Guide
TXT DKIM1 Lookup
Postmark by ActiveCampaign
SPF: include:spf.mtasv.net
DKIM: pm._domainkey
BIMI: SupportedView Guide
CNAME DKIM1 Lookup
Amazon Simple Email Service (SES)
SPF: include:amazonses.com
DKIM: token1._domainkey
BIMI: SupportedView Guide
TXT DKIM3 Lookups
Google Workspace (Gmail)
SPF: include:_spf.google.com
DKIM: google._domainkey
BIMI: SupportedView Guide
CNAME DKIM2 Lookups
Microsoft 365 (Exchange Online)
SPF: include:spf.protection.outlook.com
DKIM: selector1._domainkey
BIMI: SupportedView Guide
TXT DKIM1 Lookup
Resend
SPF: include:resend.com
DKIM: resend._domainkey
BIMI: SupportedView Guide
CNAME DKIM2 Lookups
Klaviyo
SPF: include:servers.mcsv.net
DKIM: kl._domainkey
BIMI: SupportedView Guide
CNAME DKIM2 Lookups
Intuit Mailchimp
SPF: include:servers.mcsv.net
DKIM: k1._domainkey
BIMI: SupportedView Guide
CNAME DKIM1 Lookup
HubSpot Marketing Email
SPF: include:12345.spf01.hubspotemail.net
DKIM: hs1._domainkey
BIMI: SupportedView Guide
TXT DKIM1 Lookup
Brevo (formerly Sendinblue)
SPF: include:spf.sendinblue.com
DKIM: mail._domainkey
BIMI: SupportedView Guide
CNAME DKIM1 Lookup
Customer.io
SPF: include:customeriomail.com
DKIM: cio1._domainkey
BIMI: SupportedView Guide
CNAME DKIM1 Lookup
ActiveCampaign
SPF: include:emsd1.com
DKIM: ac1._domainkey
BIMI: StandardView Guide
CNAME DKIM1 Lookup
SparkPost (MessageBird)
SPF: include:sparkpostmail.com
DKIM: scph0123._domainkey
BIMI: SupportedView Guide
CNAME DKIM1 Lookup
Intercom Outbound Email
SPF: include:mail.intercom.io
DKIM: intercom1._domainkey
BIMI: StandardView Guide
CNAME DKIM1 Lookup
Zendesk Support Mail
SPF: include:mail.zendesk.com
DKIM: zendesk1._domainkey
BIMI: StandardView Guide
CNAME DKIM1 Lookup
ConvertKit (Kit)
SPF: include:mail.convertkit.com
DKIM: ck1._domainkey
BIMI: SupportedView Guide
CNAME DKIM1 Lookup
Drip Email Marketing
SPF: include:dripemail2.com
DKIM: drip._domainkey
BIMI: StandardView Guide
TXT DKIM1 Lookup
Campaign Monitor (Marigold)
SPF: include:cmail1.com
DKIM: cm._domainkey
BIMI: SupportedView Guide
TXT DKIM1 Lookup
MailerLite
SPF: include:_spf.mlsend.com
DKIM: litesrv._domainkey
BIMI: StandardView Guide
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