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According to Live Direct Marketing's daily DNS scan (July 13, 2026), hackerrank.com (Tranco rank #8,403) receives mail via Google Workspace and sends through Mailgun, Salesforce, Amazon SES. Its DMARC policy is p=quarantine — one of the minority (47%) of DMARC publishers that actually enforce.
| Mailbox provider (MX) | Google Workspace |
|---|---|
| ESPs in SPF | Mailgun, Salesforce, Amazon SES |
| SaaS senders in SPF | none detected |
| DMARC policy | p=quarantine |
| DMARC record | v=DMARC1; p=quarantine; pct=100; rua=mailto:ac2b5s9g@ag.dmarcian.com; ruf=mailto:ac2b5s9g@fr.dmarcian.com; sp=none; aspf=r; |
| Tranco rank | #8,403 |
| Snapshot | 2026-07-13 (updated daily) |
hackerrank.com uses Google Workspace for inbound mail (detected from its primary MX record) as of July 13, 2026, per Live Direct Marketing's daily Tranco top-1M scan.
hackerrank.com authorises Mailgun, Salesforce, Amazon SES in its SPF record as of July 13, 2026.
Partially — hackerrank.com publishes p=quarantine (as of July 13, 2026).