Is cornell.edu a valid email domain?
cornell.edu has working mail routing: 1 MX record pointing to Microsoft (Outlook or Microsoft 365), led by cornell-edu.mail.protection.outlook.com.
It is not a free provider and is not on our disposable list, so addresses here usually belong to a company, school or other organisation.
SPF is published and ends with -all. DMARC is set to reject.
Check an email address at cornell.edu
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MX records (Microsoft (Outlook or Microsoft 365))
| Priority | Mail server | Resolves to |
|---|---|---|
| 0 | cornell-edu.mail.protection.outlook.com | 52.101.41.198, 52.101.41.206 |
SPF
Record published
v=spf1 ip4:128.253.150.144/30 ip4:128.253.150.158 ip4:128.253.150.176 ip4:128.253.150.177 include:_spf.google.com include:spf.protection.outlook.com include:_spf.qualtrics.com -all
DMARC
Policy: reject
v=DMARC1; p=reject; rua=mailto:rua-reports@cornell.edu,mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:ruf-reports@cornell.edu,mailto:dmarc_ruf@emaildefense.proofpoint.com; aspf=r; adkim=s;
Disposable?
No, not on our disposable list.
Free provider?
No, not a known free provider.
What this means for your email list
What this means for addresses at this domain
The domain accepts mail, but whether a given person's mailbox exists depends on that organisation. Company domains often have staff who left, role mailboxes like info@ and sales@, and sometimes catch-all rules that accept everything. Verify the individual address before you send.
Sender authentication
cornell.edu has a strict DMARC policy (reject): mail that fails authentication is refused, which protects its brand from spoofing and means anyone sending as cornell.edu must have SPF and DKIM set up correctly.
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Sign up to get a report summary →Frequently asked questions
- Is cornell.edu a valid email domain?
- Yes. cornell.edu publishes 1 MX record and can receive email. Whether a particular mailbox exists is a separate question that only a mailbox check can answer.
- Is cornell.edu a disposable email domain?
- No. cornell.edu is not on our disposable list. The list is updated regularly, and new throwaway domains appear all the time.
- What are the MX records for cornell.edu?
- cornell-edu.mail.protection.outlook.com (priority 0).
- Does cornell.edu have SPF and DMARC?
- SPF: yes, ending -all. DMARC: yes, policy reject.