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Email infrastructure of stamped.io

According to Live Direct Marketing's daily DNS scan (July 12, 2026), stamped.io (Tranco rank #9,380) receives mail via Google Workspace and sends through Zendesk, Mailgun, SendGrid (Twilio). Its DMARC policy is p=quarantine — one of the minority (47%) of DMARC publishers that actually enforce.

Mailbox provider (MX)Google Workspace
ESPs in SPFZendesk, Mailgun, SendGrid (Twilio)
SaaS senders in SPFnone detected
DMARC policyp=quarantine
DMARC recordv=DMARC1; p=quarantine; pct=100; rua=mailto:cto@stamped.io; ruf=mailto:cto@stamped.io
Tranco rank#9,380
Snapshot2026-07-12 (updated daily)

Frequently asked questions

What email provider does stamped.io use?

stamped.io uses Google Workspace for inbound mail (detected from its primary MX record) as of July 12, 2026, per Live Direct Marketing's daily Tranco top-1M scan.

What ESP does stamped.io use?

stamped.io authorises Zendesk, Mailgun, SendGrid (Twilio) in its SPF record as of July 12, 2026.

Does stamped.io enforce DMARC?

Partially — stamped.io publishes p=quarantine (as of July 12, 2026).

DNS records say who should deliver your mail — they don't say whether it lands in the inbox. Run a free inbox placement test for stamped.io at Gmail, Outlook, Yandex and Mail.ru.
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