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According to Live Direct Marketing's daily DNS scan (July 12, 2026), thunderbird.net (Tranco rank #4,389) receives mail via Google Workspace and sends through Zendesk, Mailchimp. Its DMARC policy is p=reject — one of the minority (47%) of DMARC publishers that actually enforce.
| Mailbox provider (MX) | Google Workspace |
|---|---|
| ESPs in SPF | Zendesk, Mailchimp |
| SaaS senders in SPF | none detected |
| DMARC policy | p=reject |
| DMARC record | v=DMARC1; p=reject; rua=mailto:dmarc_agg@vali.email,mailto:dmarc@mozilla.com,mailto:dmarc@thunderbird.net; ruf=mailto:sancus@thunderbird.net |
| Tranco rank | #4,389 |
| Snapshot | 2026-07-12 (updated daily) |
thunderbird.net 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.
thunderbird.net authorises Zendesk, Mailchimp in its SPF record as of July 12, 2026.
Yes — thunderbird.net publishes p=reject, the strictest DMARC policy (as of July 12, 2026).