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Domains & Authentication

Add MailBlastr DNS records on Squarespace / Google Domains

Publish the SPF, DKIM, and DMARC records MailBlastr generates for your domain using Squarespace Domains (which now manages former Google Domains).

This guide walks through adding the DNS records MailBlastr generates for a domain using Squarespace Domains — the service that now manages domains migrated from Google Domains. Add your domain in MailBlastr first to generate the records — see Managing domains — and keep the DNS records reference open for your exact DKIM record and region.

If your domain was registered with Google Domains, it has been transferred to Squarespace and these steps apply. The DNS editor layout is the same custom-records table in both.

Open the DNS settings

  1. 1
    Open your domain

    Sign in at account.squarespace.com, go to Domains, and click the domain you want to send mail from.

  2. 2
    Go to DNS Settings

    Open DNS (or DNS Settings) and scroll to the Custom Records section, which has an Add Record row.

  3. 3
    Add each record

    For each entry below pick the Type, fill in Host and Data, and Add/save. Repeat for all six records.

The Host field takes the subdomain part only — use @ for the apex and the bare prefix otherwise. Enter mailblastr._domainkey, send, and _dmarc (Squarespace appends your domain). Do not type the full …yourdomain.com.

DKIM — TXT

Add one TXT record holding your domain’s DKIM public key.

DKIM — TXT
TypeTXToptional

A single DKIM key record.

Hostmailblastr._domainkeyoptional

Squarespace appends .yourdomain.com, giving mailblastr._domainkey.yourdomain.com. mailblastr is the fixed selector MailBlastr uses.

Datav=DKIM1; k=rsa; p=<public key>optional

The DKIM key record holding your domain’s public key.

TTLDefaultoptional

Use the Squarespace default.

SPF — MX + TXT on the send subdomain

MailBlastr uses the custom MAIL FROM subdomain send.yourdomain.com. Enter send in the Host field for both records. Squarespace’s MX record includes a Priority field.

SPF — MX
TypeMXoptional

Receives bounce and complaint feedback for the MAIL FROM subdomain.

Hostsendoptional

Resolves to send.yourdomain.com.

Datafeedback-smtp.us-east-1.amazonses.comoptional

Region-specific feedback host. Replace us-east-1 with your domain’s region.

Priority10optional

MX priority field.

TTLDefaultoptional

Squarespace default.

SPF — TXT
TypeTXToptional

SPF policy for the MAIL FROM subdomain.

Hostsendoptional

Same host as the MX — resolves to send.yourdomain.com.

Datav=spf1 include:amazonses.com ~alloptional

Authorizes Amazon SES for the MAIL FROM subdomain.

TTLDefaultoptional

Squarespace default.

DMARC — TXT on _dmarc

DMARC — TXT
TypeTXToptional

DMARC policy record.

Host_dmarcoptional

Resolves to _dmarc.yourdomain.com.

Datav=DMARC1; p=none;optional

A monitoring policy to start with.

TTLDefaultoptional

Squarespace default.

Squarespace / Google Domains gotchas: edit DNS only when the domain uses Squarespace nameservers (a domain pointed elsewhere is managed at that provider); use @/bare prefixes in the Host field, never the full domain; and keep MailBlastr’s SPF on the send. subdomain rather than merging it into any apex SPF record.

Squarespace DNS changes can take up to a couple of hours to propagate. Once all six records are saved, return to MailBlastr and re-verify the domain.