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Email infrastructure of jstor.org

According to Live Direct Marketing's daily DNS scan (July 13, 2026), jstor.org (Tranco rank #1,138) receives mail via Microsoft 365 and sends through SendGrid (Twilio), Zendesk. Its DMARC policy is p=quarantine — one of the minority (47%) of DMARC publishers that actually enforce.

Mailbox provider (MX)Microsoft 365
ESPs in SPFSendGrid (Twilio), Zendesk
SaaS senders in SPFPardot (Salesforce)
DMARC policyp=quarantine
DMARC recordv=DMARC1; p=quarantine; rua=mailto:ITI_Win_DMARC@jstor.org; ruf=mailto:ITI_Win_DMARC@jstor.org; fo=0; adkim=r; aspf=r; pct=100; rf=afrf; ri=86400
Tranco rank#1,138
Snapshot2026-07-13 (updated daily)

Frequently asked questions

What email provider does jstor.org use?

jstor.org uses Microsoft 365 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 jstor.org use?

jstor.org authorises SendGrid (Twilio), Zendesk in its SPF record as of July 13, 2026.

Does jstor.org enforce DMARC?

Partially — jstor.org publishes p=quarantine (as of July 13, 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 jstor.org at Gmail, Outlook, Yandex and Mail.ru.
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