customer.io email records

What customer.io publishes in public DNS for SPF, DKIM, DMARC, MX and BIMI, resolved on 2026-08-04.

SPF

v=spf1 include:helpscoutemail.com include:_spf.google.com include:servers.mcsv.net include:amazonses.com include:mail.zendesk.com ~all

The record authorises these sending platforms: Google Workspace, Mailchimp, Resend, Zendesk.

DMARC

v=DMARC1; p=quarantine; sp=quarantine; rua=mailto:re+a0b40970b63a@inbound.dmarcdigests.com,mailto:dmarc@rp.laneful.net; aspf=r; pct=100

policy

p=quarantine

subdomains

sp=quarantine

applies to

100% of mail

reports

mailto:re+a0b40970b63a@inbound.dmarcdigests.com,mailto:dmarc@rp.laneful.net

alignment

adkim=r, aspf=r

DKIM

Keys found on 4 of 10 probed selectors:

MX

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The above is a snapshot from 2026-08-04. Re-resolve it now:

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