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Email infrastructure of plos.org

According to Live Direct Marketing's daily DNS scan (July 12, 2026), plos.org (Tranco rank #1,125) receives mail via Microsoft 365 and sends through HubSpot, SendGrid (Twilio). Its DMARC policy is p=reject — one of the minority (47%) of DMARC publishers that actually enforce.

Mailbox provider (MX)Microsoft 365
ESPs in SPFHubSpot, SendGrid (Twilio)
SaaS senders in SPFAlchemer (SurveyGizmo)
DMARC policyp=reject
DMARC recordv=DMARC1; p=reject; pct=100; rua=mailto:postmaster@plos.org
Tranco rank#1,125
Snapshot2026-07-12 (updated daily)

Frequently asked questions

What email provider does plos.org use?

plos.org uses Microsoft 365 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 plos.org use?

plos.org authorises HubSpot, SendGrid (Twilio) in its SPF record as of July 12, 2026.

Does plos.org enforce DMARC?

Yes — plos.org publishes p=reject, the strictest DMARC policy (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 plos.org at Gmail, Outlook, Yandex and Mail.ru.
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