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Email infrastructure of haveibeenpwned.com

According to Live Direct Marketing's daily DNS scan (July 13, 2026), haveibeenpwned.com (Tranco rank #6,843) receives mail via Mailgun (inbound) and sends through Mailgun, SendGrid (Twilio), Zendesk. Its DMARC policy is p=reject — one of the minority (47%) of DMARC publishers that actually enforce.

Mailbox provider (MX)Mailgun (inbound)
ESPs in SPFMailgun, SendGrid (Twilio), Zendesk
SaaS senders in SPFnone detected
DMARC policyp=reject
DMARC recordv=DMARC1; p=reject; rua=mailto:heimdall-t@dmarc.report-uri.com; ruf=mailto:heimdall-t@dmarc.report-uri.com; aspf=r; adkim=r
Tranco rank#6,843
Snapshot2026-07-13 (updated daily)

Frequently asked questions

What email provider does haveibeenpwned.com use?

haveibeenpwned.com uses Mailgun (inbound) for inbound mail (detected from its primary MX record) as of July 13, 2026, per Live Direct Marketing's daily Tranco top-1M scan.

What ESP does haveibeenpwned.com use?

haveibeenpwned.com authorises Mailgun, SendGrid (Twilio), Zendesk in its SPF record as of July 13, 2026.

Does haveibeenpwned.com enforce DMARC?

Yes — haveibeenpwned.com publishes p=reject, the strictest DMARC policy (as of July 13, 2026).

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