Email domain report
Yale University email format (yale.edu): verification & catch-all status
As of November 6, 2026, the most common yale.edu email format is [email protected], used by 86–93% of the at least 140 distinct yale.edu addresses mailfloss verified in the 90 days to November 6, 2026. yale.edu routes incoming mail through Microsoft 365. In mailfloss's checks (latest November 6, 2026), yale.edu mostly accepted mail for addresses that do not exist, so it behaves as a catch-all domain. 86–89% of mailfloss's yale.edu verifications in the 90 days to November 6, 2026 were accepted.
One address at a time, right on this page · counts rounded
- Most common format
first.last@- 86–93% of distinct addresses
- Catch-all
- Yes
- mostly accepts any address · checked November 6, 2026
- Accepted on verification
- 86–89%
- of verifications, 90 days to November 6, 2026
Verification results
How yale.edu responds to email verification
How yale.edu answered when mailfloss verified its addresses in the 90 days to November 6, 2026, most recently on November 6, 2026.
Where yale.edu stands among Microsoft 365 domains
Accepted on verificationshare of verifications accepted
86–89% yale.edu76–81% median of 49 Microsoft 365 domains
Leading listed formatshare of distinct addresses in the most common listed format
86–93% yale.edu85–95% median of 49 Microsoft 365 domains
Most common yale.edu email formats
| Format | What it means | Share | 95% range | Addresses |
|---|---|---|---|---|
[email protected] | First name, dot, last name | 86–93% | 80–96% | 125+ |
| — | Other pattern | 3–7% | 1–12% | 5+ |
| — | Other formats, combined | 3–7% | — | 5+ |
Shares are of the 140+ distinct yale.edu addresses mailfloss verified in the 90 days to November 6, 2026. A range shows where a share can sit given the addresses behind it. Uncommon formats are combined, and the words in each format are placeholders, never real names.
SMTP responses from yale.edu
| Response | What it means | Share of listed responses |
|---|---|---|
250 | Mailbox accepted the addressDeliverable | >99% |
Only answers about the mailbox itself are listed.
Catch-all
Yes, mostly accepts any address
Last checked November 6, 2026
DNS, checked November 6, 2026
MX yale-edu.mail.protection.outlook.com
SPF published · DMARC published
Free check
Verify an address at yale.edu
Type the part before the @. mailfloss asks the yale.edu mail server about that address and tells you in seconds what it answered: the same verification behind the results on this page.
Any other domain works too: type a full address. The result appears under the box; nothing you type is stored on this page.
Questions about yale.edu
Yale University email questions, answered from this data
Every answer comes from the numbers on this page, 90 days to November 6, 2026.
What email domain does Yale University use?
yale.edu. Its mail is routed through Microsoft 365 (yale-edu.mail.protection.outlook.com), with SPF published and DMARC published, checked November 6, 2026.
What is the most common yale.edu email format?
[email protected]: 86–93% (95% range 80–96%) of the 140+ distinct yale.edu addresses mailfloss verified in the 90 days to November 6, 2026. Next: "other pattern" at 3–7%.
Is yale.edu a catch-all domain?
Yes. In mailfloss's checks (latest November 6, 2026), yale.edu mostly accepted mail for addresses that do not exist, so it behaves as a catch-all domain. Verification can confirm that yale.edu accepts mail, not that a particular mailbox exists. mailfloss marks these addresses as accept-all instead of valid, so you decide whether to keep sending to them.
Do yale.edu addresses bounce?
Of mailfloss's yale.edu verifications in the 90 days to November 6, 2026, 86–89% were accepted and 13% got no clear answer.
How do I find or check an email address at yale.edu?
Build it from the person's name in the most common format, [email protected], then verify it before you send: mailfloss asks the yale.edu mail server about that exact address and reports what it answered. Because yale.edu accepts mail for any address, verification can confirm that the domain accepts mail, not that the mailbox exists, so mailfloss marks those addresses accept-all. Verify one now.
Does Yale University use Google Workspace or Microsoft 365?
Microsoft 365, the mailbox provider on mailfloss's record. Its published MX record points there too, going by its public mail records as of November 6, 2026, with no security gateway in front of it.
Typo Fixer · company domains
A subscriber who typed yael.edu is still a customer of Yale University.
Most verifiers mark yael.edu invalid and delete the subscriber. mailfloss's Typo Fixer suggests yale.edu instead, checks whether that mailbox exists, and queues the fix for you to approve. Nothing changes behind your back.
On your signup form
Example: a subscriber types first.last@yael.edu; Typo Fixer suggests first.last@yale.edu and queues it for your approval.
Other company domains on Microsoft 365
All 49 Microsoft 365 domains| Domain | Most common format | Accepted on verification | Catch-all |
|---|---|---|---|
| abm.comABM Industries | [email protected]97–100% of addresses | 85–89% | catch-all: Yes |
| amcor.comAmcor | [email protected]89–99% of addresses | 63% | catch-all: No |
| bd.comBD | [email protected]59–71% of addresses | 77% | catch-all: Yes |
| becu.orgBECU | [email protected]87–93% of addresses | 90–94% | catch-all: No |
| bms.comBristol Myers Squibb | [email protected]92–95% of addresses | 64–67% | catch-all: No |
| boehringer-ingelheim.comBoehringer Ingelheim | [email protected]85–88% of addresses | 59–62% | catch-all: No |
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Every number here comes from verifications mailfloss ran for its customers in the 90 days to November 6, 2026. Pages show rounded aggregates only: no email addresses, names or single results. Read how mailfloss measures email formats and catch-all status.
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