SFR email checker: sfr.fr and neuf.fr
In short: Asks SFR's own mail server whether an sfr.fr, neuf.fr or cegetel.net mailbox exists, without sending anything, after syntax, domain, disposable and role checks. Limit: A valid result shows SFR accepted the mailbox today, not that anyone reads it.
To check if an SFR address exists, enter it here. The checker asks SFR's mail server about an sfr.fr, neuf.fr or cegetel.net mailbox at RCPT TO, then disconnects before any message is sent. SFR rejected made-up addresses with 550 5.1.1 … User unknown on 13 October and 8 November 2026, so a missing mailbox comes back invalid and an accepted one valid.
Price: this tool is free. Checking a whole email list is from $9/mo, and the first 100 checks are free with Google, no card. Check your list free nowSee pricing
Tuned for sfr.fr, neuf.fr, cegetel.net. Five checks a minute, no account needed. Nothing is sent to the address — we ask its mail server whether the mailbox exists, then disconnect.
What can a check confirm at SFR Mail, and what did we measure there? Can you verify a SFR Mail address?
Sample result
[email protected] doesn't exist: SFR's server rejected it.
- [email protected]
- Reason
- Mailbox not found
- Mailbox check
- SMTP, nothing sent
What this means for you
Invalid means remove it; a real mailbox would come back valid.
- Asks SFR's server at RCPT TO
- Catch-all test with a random address first
- Catches typo domains with no mail server
- Flags disposable and role addresses
- SFR
- sfr.fr
- neuf.fr
By SimpleVerifier Team · Last updated
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How do I check a whole list of SFR addresses?
- Export the list as a CSV or copy the email column; SFR rows and every other domain can go in together.
- Upload or paste it at /verify. The first 100 email checks are free with a Google sign-in, no card.
- For every list after that, Pro includes unlimited email verification. Fair use: the first 100,000 checks a month at full speed, then slower, never cut off.
How do I check an SFR email address?
- Type or paste one address, such as
[email protected]or[email protected]. - Press Check. The tool checks the syntax and domain, asks SFR's server about a random address that can't exist, then about yours, and disconnects before anything is sent.
- Read the verdict: valid means SFR accepted the mailbox and rejected the made-up one, invalid means it said the user is unknown, risky means the check didn't get a clear answer.
- If it comes back risky, check again later: with SFR that is usually a cut-short check, not a bad address.
Example
- You enter
- One address:
[email protected]. - You get
- Valid when SFR accepts the mailbox after rejecting a random address; invalid ("Mailbox not found") when it answers
550 5.1.1 … User unknown; risky only when the check gets no clear answer. - Limits
- Five checks a minute per IP address, one address at a time, no account needed.
Can you check if an SFR email address exists?
Yes. On 8 November 2026 sfr.fr, neuf.fr and cegetel.net all published the same MX host, smtp-in.sfr.fr. On 13 October 2026 it answered a made-up sfr.fr address at RCPT TO with 550 5.1.1 Recipient address rejected: User unknown, and a fresh made-up address got the same rejection through this checker on 8 November.
A rejection comes back invalid ("Mailbox not found") and an acceptance valid, after a random address is tested first so a yes means something. The SFR provider page has the full DNS snapshot.
What happens to an @sfr.fr address when someone leaves SFR?
SFR's help page says addresses in the form [email protected] or [email protected] stop being accessible once a SFR Box or SFR Mobile line is cancelled, while other @sfr.fr addresses stay accessible for 12 months. Contacts who left SFR may have a dead address on your list.
SFR also blocks mailboxes for unusual activity and names not having used the address in the last six months as one possible cause. Re-check older SFR contacts before a send and remove hard bounces.
Can I check a whole list of French addresses?
Yes. Sign in and use the bulk verifier for a CSV or a pasted list; SFR rows get the same mailbox check as here, alongside Orange, La Poste, Gmail and everything else.
For the other big French providers, the Orange email checker and La Poste email checker say what their servers answer. The email checker handles any other domain.
What can this checker confirm at SFR?
Each row is something the check runs on a SFR address, and the result you can get from it.
| Check | Can we confirm it? | Result when it fails |
|---|---|---|
| Syntax (the address is written correctly) | Yes | Invalid |
| Domain and mail server (MX) | Yes | Invalid, with a typo suggestion where one fits |
| Disposable or role address | Yes | Invalid (disposable) or risky (role) |
| The mailbox exists | Yes: SFR answers at RCPT TO (550 5.1.1 User unknown) | Invalid, "Mailbox not found" |
| A temporary reply or timeout | No answer to read | Risky, worth checking again later |
| Someone reads the inbox | No checker can | Use opens, replies or a small first send |
Our checking server offered a made-up address and disconnected without sending, on 12 or 13 October 2026 and again through this checker on 8 November 2026.
Who uses this tool, and for what?
- French shops and newsletters
- Catch sfr.fr addresses of former SFR customers that stopped working before a campaign.
- Support teams
- Spot a mistyped sfr.fr address, or a typo domain like sfr.fe, before replying.
- Anyone cleaning an old French list
- Separate SFR mailboxes the server rejected from ones it accepted.
What can’t this tool tell you?
- A valid result shows SFR accepted the mailbox today, not that anyone reads it.
- A temporary reply or a refused connection comes back risky, not invalid.
- SFR doesn't publish how its servers answer mailbox checks; the handling here is from our own checks, which can change.
- One address at a time, five a minute.
Common questions
- How do I check if an sfr.fr email address is valid?
- Enter it here. The checker confirms the syntax and mail server, then asks SFR's server about the mailbox without sending. SFR rejects addresses that don't exist, so a missing mailbox comes back invalid.
- Are neuf.fr addresses SFR addresses?
- They use SFR's mail server: on 8 November 2026 neuf.fr and cegetel.net published the same MX host as sfr.fr, smtp-in.sfr.fr, so this checker covers all three.
- Does an @sfr.fr address stop working after I cancel SFR?
- SFR's help says 06 and 07 number addresses stop being accessible after a SFR Box or SFR Mobile line is cancelled, and other @sfr.fr addresses stay accessible for 12 months.
- Why did my SFR address come back risky?
- SFR answers mailbox checks, so risky usually means the check was cut short by a temporary reply or a refused connection. Check again later before you drop the address.
- Is this checker free?
- Yes, five checks a minute with no account. For a whole list, sign in with Google for 100 free email checks, no card, or use a monthly plan.
Sources
That was one address. Most people have a list.
The free checker does five addresses a minute, one at a time — fine for spot-checking, useless for a CSV of 40,000.
- Upload a CSV up to 100,000 rows
- Valid, risky and invalid exported as separate files
- Repeat checks free for 14 days, no new connections
Plans from $9 a month, cancel anytime, no contract. Sign in with Google and your first 100 email checks are free, no card. The free tools stay free either way.