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Domains & Authentication

Add MailBlastr DNS records on AWS Route 53

Publish the SPF, DKIM, and DMARC records MailBlastr generates for your domain in an AWS Route 53 hosted zone.

This guide walks through adding the DNS records MailBlastr generates for a domain in an AWS Route 53 hosted zone. 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.

You need a Route 53 public hosted zone for your domain, with your registrar’s nameservers pointed at it. (MailBlastr’s sending region and your Route 53 hosted zone are independent — Route 53 is global DNS regardless of which region your mail goes through.)

Open the hosted zone

  1. 1
    Open Route 53

    In the AWS Console go to Route 53 → Hosted zones and click the hosted zone for your domain.

  2. 2
    Create records

    Click Create record. Use Quick create record to add several records on one screen, or create them one at a time.

  3. 3
    Add each record

    For each entry below set Record name, Record type, and Value, then Create records. Repeat for all six.

In Route 53 the Record name is the subdomain portion; the console shows your domain as a fixed suffix beside the input. Enter mailblastr._domainkey, send, and _dmarc — do not retype .yourdomain.com. Leave the record name blank only for the apex (you won’t need that here).

DKIM — TXT

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

DKIM — TXT
Record typeTXToptional

A single DKIM key record.

Record namemailblastr._domainkeyoptional

Combined with the zone suffix this is mailblastr._domainkey.yourdomain.com. mailblastr is the fixed selector MailBlastr uses.

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

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

TTL300optional

Route 53 default (seconds).

SPF — MX + TXT on send.yourdomain.com

MailBlastr uses the custom MAIL FROM subdomain send.yourdomain.com. Set the Record name to send for both records. In Route 53 the MX priority is part of the value — enter it as 10 feedback-smtp.<region>.amazonses.com. Wrap the TXT value in double quotes.

SPF — MX
Record typeMXoptional

Receives bounce and complaint feedback for the MAIL FROM subdomain.

Record namesendoptional

Resolves to send.yourdomain.com.

Value10 feedback-smtp.us-east-1.amazonses.comoptional

Priority and host on one line — 10 is the priority. Replace us-east-1 with your domain’s region.

TTL300optional

Route 53 default.

SPF — TXT
Record typeTXToptional

SPF policy for the MAIL FROM subdomain.

Record namesendoptional

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

Value"v=spf1 include:amazonses.com ~all"optional

Authorizes Amazon SES for the MAIL FROM subdomain. Route 53 requires TXT values in double quotes.

TTL300optional

Route 53 default.

DMARC — TXT on _dmarc.yourdomain.com

DMARC — TXT
Record typeTXToptional

DMARC policy record.

Record name_dmarcoptional

Resolves to _dmarc.yourdomain.com.

Value"v=DMARC1; p=none;"optional

A monitoring policy to start with. Keep it in double quotes.

TTL300optional

Route 53 default.

Route 53-specific gotchas: TXT values must be double-quoted; the MX priority goes inside the value (10 host), not a separate field; and confirm your registrar’s nameservers actually point at this hosted zone (Route 53 → hosted zone NS records) or nothing you add here resolves publicly.

Route 53 applies changes within a minute, though resolver caches honor the TTL. Once all six records exist, return to MailBlastr and re-verify the domain.