Domain Intelligence
Last Updated:
Sfr Email Verification
Safe to Send
Sfr.fr is operated by SFR France. The domain runs 1 mail exchange and SMTP is responsive, with 2 of 3 authentication standards in place.
Safe to Send
RISK
22
/100
Low
Verify Mailbox
Verify @sfr.fr emails
Live SMTP handshake against sfr.fr mail servers. No email is sent. 10 free per day, no signup.
Trusted by 400,000+ senders
4.9/5
From 8,500+ verified reviews
The risk score saves my team probably an hour a day in manual prospect research. We sort outreach lists by it and skip anything in the high-risk band. Bounce rate is the lowest it's ever been. Lisa Fonseca · SDR Team Lead
SOC 2 Type II
GDPR
CCPA
99.7% Accuracy
Disposable
No
Persistent addresses, not throwaway
SMTP Live
Yes
Mail server responds to SMTP handshake
MX Records
1
Mail exchangers
Mail Exchange (MX) Records for sfr.fr Mail Exchange records. They tell other mail servers which hosts are responsible for receiving email at this domain, in priority order. Lower priority numbers are tried first.
#10
smtp-in.sfr.fr 93.17.128.123
Reachable
SMTP Handshake
Simple Mail Transfer Protocol. We open a live SMTP connection to the primary MX and read the greeting banner. A response confirms the mail server is alive and accepting connections.
Responsive
BANNER220-msfrf2609.sfr.fr ESMTP **************************
Primary mail server accepted SMTP connection and returned a banner during the live audit.
sfr.fr Email Authentication SPF · DKIM · DMARC
SPF
Sender Policy Framework. A DNS record listing which servers are allowed to send mail for this domain. Receivers reject or flag mail from unauthorized servers.
Pass
TXTv=spf1 ip4:93.17.128.0/24 ip4:198.2.187.67 ip4:52.36.127.248 ip4:86.64.210.3 ip4:86.64.210.5 ip4:86.64.210.19 ip4:86.64.210.79 ip4:86.64.210.153 ip4:86.64.210.154 ip4:195.62.75.16/29 include:spf1.sfr.fr -all
Authorized senders are defined and pass SPF policy.
DKIM
DomainKeys Identified Mail. The sending server cryptographically signs outbound mail with a private key, and receivers verify the signature using a public key in DNS.
Missing
No DKIM signature detected on common selectors for sfr.fr.
No DKIM signature was detected. Receivers cannot verify the integrity of outbound mail.
DMARC
Domain-based Message Authentication, Reporting & Conformance. Tells receivers what to do when SPF or DKIM checks fail: none, quarantine, or reject.
Reject
TXTv=DMARC1;p=reject;rua=mailto:sfr@rua.netcraft.com,mailto:btw68igl@ag.dmarcian-eu.com;ruf=mailto:sfr@ruf.netcraft.com,mailto:btw68igl@fr.dmarcian-eu.com;fo=1;adkim=s;aspf=r;sp=reject;
Strict policy. Receivers are instructed to reject any mail that fails SPF or DKIM. The strongest available setting.
sfr.fr Domain Registration WHOIS · Nameservers · Registrar
RegistrarSFR
RegisteredJuly 22, 1996
Last UpdatedDecember 31, 2025
ExpiresNovember 18, 2026
Age29 years
TLD.fr
Authoritative Nameservers (2)
- ns1pub.sfr.fr
- ns2pub.sfr.fr
Registrant
SOCIETE FRANCAISE DU RADIOTELEPHONE - SFR
domaine@sfr.com·FRANCE·33185060000
Technical Contact
SOCIETE FRANCAISE DU RADIOTELEPHONE - SFR
domaine@sfr.com·FRANCE·33185060000
About this Domain
About sfr.fr
sfr.fr is a French email service provided by SFR, one of France's major telecommunications operators and part of Altice France. Based in Paris, SFR provides broadband, mobile, and email services with free accounts for SFR subscribers.
sfr.fr implements SPF and DKIM authentication. The service complies with French CNIL regulations and EU GDPR. Anti-spam filtering protects SFR's large French user base.
The sfr.fr mail servers enforce recipient verification and reject invalid addresses. The domain does not operate as catch-all. Rate limiting applies from unfamiliar senders.
For delivery to sfr.fr, authenticate with SPF and DKIM. French providers apply strict filtering. Comply with French anti-spam regulations.
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More Email Verification Tools
Free single-address checks, bulk uploads, and APIs for plugging email verification into your own product.
Common Questions About sfr.fr
Is sfr.fr a disposable or temporary email provider?
No. sfr.fr is not a disposable email provider. It is classified as Free Email Provider operated by SFR France and addresses on sfr.fr are persistent rather than throwaway. Mail sent to a valid sfr.fr mailbox reaches a real recipient.
How do I verify if a sfr.fr email address is valid?
The fastest way to verify a sfr.fr email address is to use our email checker. Enter any @sfr.fr mailbox at the top of this page and our system performs a real-time SMTP handshake against sfr.fr's mail servers, confirming whether the mailbox exists, is reachable, and is safe to send to. No email is ever delivered during the check.
Can I check if a sfr.fr email exists without sending a message?
Yes. Our real-time email verification API connects directly to sfr.fr's mail server, opens an SMTP session, and queries the mailbox using the RCPT TO command without ever transmitting an actual email. The server's response confirms whether the sfr.fr mailbox is valid, full, or non-existent. The recipient never receives anything and never sees the check.
What are the MX records for sfr.fr?
sfr.fr currently publishes 1 mail exchange (MX) record. The primary MX is smtp-in.sfr.fr, which is the first server contacted when other mail systems try to deliver email to a sfr.fr address. The full list with priorities and IP addresses is in the MX Records panel above. MX records tell sending servers where to route email for sfr.fr.
Does sfr.fr use SPF, DKIM, and DMARC email authentication?
sfr.fr has 2 of the 3 standard email authentication records in place: SPF, and DMARC (policy: reject). Adding the missing layer(s) would tighten anti-spoofing protection and improve deliverability for legitimate sfr.fr mail.
Why do emails to sfr.fr bounce or get blocked?
Bounces from sfr.fr usually fall into three buckets: the mailbox doesn't exist (5xx user unknown), the inbox is full, or your sending domain isn't authenticated to sfr.fr's satisfaction. The fastest fix is to run each address through a free email verifier before you send, and to make sure your own SPF, DKIM, and DMARC are configured correctly so sfr.fr's receivers trust you.
How can I verify a large list of sfr.fr email addresses?
Our bulk email verifier accepts CSV or TXT uploads with thousands or millions of sfr.fr addresses (or any mix of domains). Every address goes through 30+ checks including SMTP existence, sfr.fr catch-all detection, role-account detection, and disposable-domain matching. Results typically come back within minutes and previously-failed addresses on your blacklist are reprocessed for free. For continuous high-volume needs, see our unlimited email verification API.
Is it safe to accept signups from sfr.fr email addresses?
Yes, with normal hygiene. sfr.fr is a legitimate email service and signups from @sfr.fr behave like any other real user. Pipe each address through a real-time email verifier API at the moment of signup to catch typos and dead mailboxes, but there is no need to block sfr.fr by default.
What email format does sfr.fr use for usernames?
Most sfr.fr mailboxes follow common patterns like first.last@sfr.fr, firstinitiallast@sfr.fr, or first@sfr.fr, but the actual local-part rules depend on SFR France. The only reliable way to confirm whether a specific @sfr.fr address exists is to run it through a free email verification tool. Guessing patterns will produce a high bounce rate and damage your sender reputation.
How is the sfr.fr risk score calculated?
The 0-to-100 risk score for sfr.fr combines disposable-domain classification, mail-server reachability, MX record presence and depth, SPF / DKIM / DMARC enforcement, DMARC policy strength, SMTP banner response, and domain age. Lower scores mean safer to send to. Disposable domains are pinned at the high end of the scale. The sfr.fr score is recomputed on every audit so it always reflects the live state of the domain.
Is sfr.fr a valid email domain?
Yes, sfr.fr is a valid free email domain operated by SFR France. It provides permanent email accounts to users.
Is sfr.fr a disposable or temporary email provider?
No, sfr.fr is not a disposable or temporary email provider. It offers permanent email accounts with standard email features.
What mail server does sfr.fr use?
sfr.fr uses mail servers operated by SFR France. Check the MX records section above for specific server details.
Can I send marketing emails to sfr.fr addresses?
Yes, with proper opt-in consent. Follow email best practices and ensure SPF, DKIM, and DMARC authentication is configured for your sending domain.
How do I verify an email address at sfr.fr?
Use BulkEmailChecker to verify sfr.fr addresses via SMTP checks. Verification behavior varies by provider. Our tool handles provider-specific rate limiting automatically.