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    Chapter · DKIM for Brevo
    Revised 17 Jun 2026
    Guide · DKIM · Brevo

    How to set up DKIM for Brevo.

    Brevo (formerly Sendinblue, rebranded 2023) is a marketing + transactional ESP popular outside North America. Their setup uses delegated subdomains similar to SendGrid.

    Afsan Rahmatullah
    Afsan RahmatullahMailerMonk

    DKIM (DomainKeys Identified Mail, RFC 6376) is the cryptographic signature attached to outgoing email so receivers can verify the message wasn't tampered with and that it actually came from a server authorized by your domain. To turn it on for Brevo, you publish one or more DNS records at `<selector>._domainkey.<your-domain>` containing the public key matching the private key Brevo uses to sign.

    Most ESPs (including Brevo) ask you to publish CNAME records that point at hosted keys they manage. This is preferable to publishing the raw key text yourself — when the provider rotates keys, your DNS keeps pointing to the rotated key and nothing breaks.

    Publish these DNS records

    Add the following record(s) to your domain's DNS zone. Most registrars (Cloudflare, Route 53, Namecheap, GoDaddy) accept values exactly as shown.

    Record · TXT
    Type
    TXT
    Host
    mail._domainkey
    Value
    k=rsa; p=<KEY_FROM_BREVO>
    Why this matters
    • Brevo uses the literal selector `mail` and publishes the raw key as TXT. Some other guides reference an `s1`/`s2` pair — that's an older multi-key setup; current Brevo accounts use `mail` only.

    Where in Brevo

    The DKIM configuration lives in Brevo → Senders, Domains & Dedicated IPs → Domains → Authenticate this domain.

    Verify the records

    After the records propagate, run the DKIM Checker against your domain with each selector to confirm the public key resolves and parses correctly.

    From a terminal
    dig +short TXT <selector>._domainkey.your-domain.com
    Run the free DKIM checker

    Common pitfalls

    Pitfall
    • Brevo's free tier sends from `@sendinblue.com` until you authenticate a domain — even after authentication, transactional mail through the SMTP relay defaults to a random subdomain unless you explicitly configure the From: address.
    • The Sendinblue → Brevo rebrand left some docs and DNS templates with stale `sendinblue.com` references. The current canonical DNS host is `brevo.com`.
    After you publish

    Want to know if it actually keeps working?

    MailerMonk continuously watches your DKIM record, aggregate DMARC reports, and inbox placement — and pings you the moment something drifts. Free for the first domain.

    Start free trial

    About the author

    Afsan Rahmatullah
    Afsan Rahmatullah
    MailerMonk

    Building tools that keep cold email out of spam. Writes about deliverability, DMARC, and what actually moves inbox placement.

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