← Look up another domain · Email Stats home

Email infrastructure of codecademy.com

According to Live Direct Marketing's daily DNS scan (July 13, 2026), codecademy.com (Tranco rank #5,232) receives mail via Microsoft 365 and sends through Customer.io, Zendesk. Its DMARC policy is p=reject — one of the minority (47%) of DMARC publishers that actually enforce.

Mailbox provider (MX)Microsoft 365
ESPs in SPFCustomer.io, Zendesk
SaaS senders in SPFExtole
DMARC policyp=reject
DMARC recordv=DMARC1; p=reject; sp=reject; adkim=s; aspf=s; rua=mailto:dmarc-forensics@skillsoft.com; ruf=mailto:dmarc-records@skillsoft.com; fo=1:s:d
Tranco rank#5,232
Snapshot2026-07-13 (updated daily)

Frequently asked questions

What email provider does codecademy.com use?

codecademy.com 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 codecademy.com use?

codecademy.com authorises Customer.io, Zendesk in its SPF record as of July 13, 2026.

Does codecademy.com enforce DMARC?

Yes — codecademy.com publishes p=reject, the strictest DMARC policy (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 codecademy.com at Gmail, Outlook, Yandex and Mail.ru.
Test deliverability →