Email domain report
Mayo Clinic email format (mayo.edu): verification & catch-all status
As of November 6, 2026, the most common mayo.edu email format is [email protected], used by 97% of the at least 995 distinct mayo.edu addresses mailfloss verified in the 90 days to November 6, 2026. In mailfloss's checks (latest November 6, 2026), mayo.edu mostly rejected addresses that do not exist, so it is not a catch-all domain. 96% of mailfloss's mayo.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
last.first@- 97% of distinct addresses
- Catch-all
- No
- mostly rejects unknown mailboxes · checked November 6, 2026
- Mail routed through
mail5.mayo.edu- Accepted on verification
- 96%
- of verifications, 90 days to November 6, 2026
Verification results
How mayo.edu responds to email verification
How mayo.edu answered when mailfloss verified its addresses in the 90 days to November 6, 2026, most recently on November 6, 2026.
Most common mayo.edu email formats
| Format | What it means | Share | 95% range | Addresses |
|---|---|---|---|---|
[email protected] | Last name, dot, first name | 97% | 95–99% | 965+ |
| — | One word, not a recognised name | 1% | 0–3% | 10+ |
| — | Contains digits | 1% | 0–3% | 10+ |
| — | Other pattern | <1% | 0–2% | 5+ |
Shares are of the 995+ distinct mayo.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 mayo.edu
| Response | What it means | Share of listed responses |
|---|---|---|
250 | Mailbox accepted the addressDeliverable | 97% |
550 5.1.0 | Mailbox does not existUndeliverable | 3% |
Only answers about the mailbox itself are listed.
Catch-all
No, mostly rejects unknown mailboxes
Last checked November 6, 2026
DNS, checked November 6, 2026
MX mail5.mayo.edu
SPF published · DMARC published
Mailbox provider Microsoft 365
Free check
Verify an address at mayo.edu
Type the part before the @. mailfloss asks the mayo.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 mayo.edu
Mayo Clinic 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 Mayo Clinic use?
mayo.edu. Its MX record points to mail5.mayo.edu, with SPF published and DMARC published, checked November 6, 2026.
What is the most common mayo.edu email format?
[email protected]: 97% (95% range 95–99%) of the 995+ distinct mayo.edu addresses mailfloss verified in the 90 days to November 6, 2026. Next: "one word, not a recognised name" at 1% and "contains digits" at 1%.
Is mayo.edu a catch-all domain?
No. In mailfloss's checks (latest November 6, 2026), mayo.edu mostly rejected addresses that do not exist, so it is not a catch-all domain. Because mayo.edu mostly rejects mailboxes that do not exist, a permanent (5xx) "mailbox does not exist" or "account disabled" answer from it is reliable, and those addresses can come off your list; a 4xx answer is temporary, so retry it. An accepted answer is strong but not certain evidence that the mailbox exists. A full inbox or a busy mailbox is temporary, so recheck those later.
Do mayo.edu addresses bounce?
Of mailfloss's mayo.edu verifications in the 90 days to November 6, 2026, 96% were accepted, 3% were rejected and 1% got no clear answer.
How do I find or check an email address at mayo.edu?
Build it from the person's name in the most common format, [email protected], then verify it before you send: mailfloss asks the mayo.edu mail server about that exact address and reports what it answered. Because mayo.edu is not a catch-all domain, a clear answer means what it says. Verify one now.
Does Mayo Clinic use Google Workspace or Microsoft 365?
Microsoft 365, the mailbox provider on mailfloss's record. Its published MX record is not one mailfloss recognises, so whether a security gateway sits in front of it is not known.
Typo Fixer · company domains
A subscriber who typed maoy.edu is still a customer of Mayo Clinic.
Most verifiers mark maoy.edu invalid and delete the subscriber. mailfloss's Typo Fixer suggests mayo.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 last.first@maoy.edu; Typo Fixer suggests last.first@mayo.edu and queues it for your approval.
Other domains mailfloss reports on
All domains| Domain | Most common format | Accepted on verification | Catch-all |
|---|---|---|---|
| morganstanley.comMorgan Stanley | [email protected]81–89% of addresses | 55–59% | catch-all: No |
| mountsinai.orgMount Sinai | [email protected]94% of addresses | 80% | catch-all: No |
| northwestern.eduNorthwestern University | [email protected]40–45% of addresses | 85–88% | catch-all: No |
| orlen.plORLEN | [email protected]87–95% of addresses | 82–86% | catch-all: No |
| roche.comRoche | [email protected]85–88% of addresses | 73–76% | catch-all: No |
| siemens.comSiemens | [email protected]85–99% of addresses | 50–54% | catch-all: No |
One check is a start. Keep every address on your list deliverable.
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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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