Email domain report
Sanofi email format (sanofi.com): verification & catch-all status
As of November 6, 2026, the most common sanofi.com email format is [email protected], used by 89–93% of the at least 335 distinct sanofi.com addresses mailfloss verified in the 90 days to November 6, 2026. sanofi.com routes incoming mail through Mimecast. In mailfloss's checks (latest November 6, 2026), sanofi.com mostly rejected addresses that do not exist, so it is not a catch-all domain. 82–85% of mailfloss's sanofi.com 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@- 89–93% of distinct addresses
- Catch-all
- No
- mostly rejects unknown mailboxes · checked November 6, 2026
- Accepted on verification
- 82–85%
- of verifications, 90 days to November 6, 2026
Verification results
How sanofi.com responds to email verification
How sanofi.com answered when mailfloss verified its addresses in the 90 days to November 6, 2026, most recently on November 6, 2026.
Where sanofi.com stands among Mimecast domains
Leading listed formatshare of distinct addresses in the most common listed format
89–93% sanofi.com70–93% median of 5 Mimecast domains
Most common sanofi.com email formats
| Format | What it means | Share | 95% range | Addresses |
|---|---|---|---|---|
[email protected] | First name, dot, last name | 89–93% | 86–95% | 305+ |
| — | Other pattern | 5–8% | 3–11% | 20+ |
| — | Contains digits | 1% | 0–6% | 5+ |
Shares are of the 335+ distinct sanofi.com 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 sanofi.com
| Response | What it means | Share of listed responses |
|---|---|---|
250 | Mailbox accepted the addressDeliverable | 96–99% |
550 | Mailbox does not existUndeliverable | 2% |
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 de-smtp-inbound-2.mimecast.com
SPF published · DMARC published
Mailbox provider Microsoft 365
Free check
Verify an address at sanofi.com
Type the part before the @. mailfloss asks the sanofi.com 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 sanofi.com
Sanofi 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 Sanofi use?
sanofi.com. Its mail is routed through Mimecast (de-smtp-inbound-2.mimecast.com), with SPF published and DMARC published, checked November 6, 2026.
What is the most common sanofi.com email format?
[email protected]: 89–93% (95% range 86–95%) of the 335+ distinct sanofi.com addresses mailfloss verified in the 90 days to November 6, 2026. Next: "other pattern" at 5–8% and "contains digits" at 1%.
Is sanofi.com a catch-all domain?
No. In mailfloss's checks (latest November 6, 2026), sanofi.com mostly rejected addresses that do not exist, so it is not a catch-all domain. Because sanofi.com 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 sanofi.com addresses bounce?
Of mailfloss's sanofi.com verifications in the 90 days to November 6, 2026, 82–85% were accepted, 14% got no clear answer and 2% were rejected.
How do I find or check an email address at sanofi.com?
Build it from the person's name in the most common format, [email protected], then verify it before you send: mailfloss asks the sanofi.com mail server about that exact address and reports what it answered. Because sanofi.com is not a catch-all domain, a clear answer means what it says. Verify one now.
Does Sanofi use Google Workspace or Microsoft 365?
Microsoft 365, the mailbox provider on mailfloss's record. Its published MX record points to Mimecast, a security gateway that filters mail before it reaches the mailbox, going by its public mail records as of November 6, 2026.
Typo Fixer · company domains
A subscriber who typed sanoif.com is still a customer of Sanofi.
Most verifiers mark sanoif.com invalid and delete the subscriber. mailfloss's Typo Fixer suggests sanofi.com 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@sanoif.com; Typo Fixer suggests first.last@sanofi.com and queues it for your approval.
Other company domains on Mimecast
All 5 Mimecast domains| Domain | Most common format | Accepted on verification | Catch-all |
|---|---|---|---|
| walgreens.comWalgreens | [email protected]51–76% of addresses | 64–71% | catch-all: No |
| ascension.orgAscension | [email protected]70–78% of addresses | 93–97% | catch-all: No |
| carolinaone.comCarolina One Real Estate | [email protected]62–95% of addresses | — | catch-all: No |
| cbrealty.comColdwell Banker Realty | [email protected]85–99% of addresses | 84–93% | catch-all: No |
One check is a start. Keep every address on your list deliverable.
mailfloss runs this verification on your whole list, inside your email platform, and keeps running it as addresses change. Product teams and AI agents get the same checks from the API.
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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