✚HealthCheck Email

Setup guides

The exact DNS records for every service you send with

SPF, DKIM, and DMARC per provider — copy-paste values where they're universal, and the precise dashboard path where they're unique to your account.

Mailbox providers

Google Workspace

Gmail for business — SPF include, 2048-bit DKIM from the Admin Console.

Microsoft 365

Outlook/Exchange Online — SPF include plus two DKIM CNAMEs from Defender.

Zoho Mail

SPF include (region-specific) and a DKIM TXT generated in the Zoho admin.

Transactional emails

Amazon SES

Easy DKIM via three CNAMEs; SPF alignment needs a custom MAIL FROM domain.

SendGrid

Domain authentication via three account-specific CNAMEs — no SPF TXT needed.

Mailgun

SPF include on your sending subdomain plus a DKIM TXT from the dashboard.

Postmark

One unique DKIM TXT plus a fixed return-path CNAME target (pm.mtasv.net).

Resend

Developer-first email API — SPF on the send subdomain plus a DKIM TXT.

Marketing platforms

Brevo

Fixed SPF include plus DKIM and verification TXT records from the dashboard.

Mailchimp

Two fixed DKIM CNAMEs (dkim2/dkim3.mcsv.net) — no SPF record needed.

Klaviyo

Dedicated sending domain — records generated per account in Klaviyo settings.

HubSpot

Email sending domain connected via account-specific DKIM CNAMEs.