Domain Intelligence
Last Updated:
Demon Email Verification
Proceed With Care
Demon.net is operated by Demon Internet. The domain runs 2 mail exchanges and SMTP is not currently responding, with no email authentication detected.
Proceed With Care
RISK
59
/100
Medium
Verify Mailbox
Verify @demon.net emails
Live SMTP handshake against demon.net 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
Reached out to support during our API integration last month. Response in under 15 minutes, the rep was so sharp and helpful that by the end of the thread it honestly felt like I was flirting with him. Amazing support team. A+++. Nathan Orozco · Lead Engineer · via X
SOC 2 Type II
GDPR
CCPA
99.7% Accuracy
Disposable
No
Persistent addresses, not throwaway
SMTP Live
No
Mail server not responding to SMTP
MX Records
2
Mail exchangers
Mail Exchange (MX) Records for demon.net 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.
#5
anchor-hub-internal.mail.demon.net
No Response
#10
lon1-hub-internal.mail.demon.net
No Response
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.
No Response
BANNER220 demon.net ESMTP Service Ready
Primary mail server did not respond to SMTP within the audit timeout. Mail to demon.net may bounce.
demon.net 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.
Missing
No SPF TXT record published for demon.net.
No valid SPF record was published. Receivers cannot confirm which servers are allowed to send mail for this domain.
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 demon.net.
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.
Missing
No DMARC record published at _dmarc.demon.net.
No DMARC policy is published. Receivers have no instruction for handling failed messages from this domain.
demon.net Domain Registration WHOIS · Nameservers · Registrar
RegistrarAscio Technologies, Inc
IANA ID106
RegisteredDecember 20, 1992
Last UpdatedDecember 20, 2025
ExpiresDecember 19, 2026
Age33 years
TLD.net
Authoritative Nameservers (2)
- ANS1.CW.NET
- ANS2.CW.NET
Registrant
Not Disclosed
Not Disclosed
Not Disclosed, Berkshire, UNITED KINGDOM
Technical Contact
Not Disclosed
Not Disclosed
Not Disclosed, Not Disclosed, UNITED STATES
About this Domain
About demon.net
demon.net is a legacy UK ISP email domain from Demon Internet, one of Britain's earliest commercial ISPs founded in 1992. Now part of Vodafone UK, existing demon.net addresses continue for legacy users.
demon.net operates through Vodafone's infrastructure with SPF authentication.
The demon.net mail servers validate recipients and reject invalid addresses. The domain does not function as catch-all.
For delivery to demon.net, authenticate with SPF and DKIM. Follow UK email regulations.
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Common Questions About demon.net
Is demon.net a disposable or temporary email provider?
No. demon.net is not a disposable email provider. It is classified as ISP Email Provider operated by Demon Internet and addresses on demon.net are persistent rather than throwaway. Mail sent to a valid demon.net mailbox reaches a real recipient.
How do I verify if a demon.net email address is valid?
The fastest way to verify a demon.net email address is to use our email checker. Enter any @demon.net mailbox at the top of this page and our system performs a real-time SMTP handshake against demon.net'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 demon.net email exists without sending a message?
Yes. Our real-time email verification API connects directly to demon.net'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 demon.net mailbox is valid, full, or non-existent. The recipient never receives anything and never sees the check.
What are the MX records for demon.net?
demon.net currently publishes 2 mail exchange (MX) records. The primary MX is anchor-hub-internal.mail.demon.net, which is the first server contacted when other mail systems try to deliver email to a demon.net 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 demon.net.
Does demon.net use SPF, DKIM, and DMARC email authentication?
demon.net does not currently publish any of the three standard email authentication records (SPF, DKIM, DMARC). This means receivers have no automated way to confirm whether mail claiming to come from @demon.net is legitimate, which can hurt deliverability and increases the risk of spoofing.
Why do emails to demon.net bounce or get blocked?
Bounces from demon.net 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 demon.net'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 demon.net's receivers trust you.
How can I verify a large list of demon.net email addresses?
Our bulk email verifier accepts CSV or TXT uploads with thousands or millions of demon.net addresses (or any mix of domains). Every address goes through 30+ checks including SMTP existence, demon.net 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 demon.net email addresses?
Yes, with normal hygiene. demon.net is a legitimate email service and signups from @demon.net 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 demon.net by default.
What email format does demon.net use for usernames?
Most demon.net mailboxes follow common patterns like first.last@demon.net, firstinitiallast@demon.net, or first@demon.net, but the actual local-part rules depend on Demon Internet. The only reliable way to confirm whether a specific @demon.net 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 demon.net risk score calculated?
The 0-to-100 risk score for demon.net 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 demon.net score is recomputed on every audit so it always reflects the live state of the domain.
Is demon.net a valid ISP email domain?
Yes, demon.net is a valid email domain provided by Demon Internet to its internet subscribers. It is a legitimate ISP-issued email address.
Is demon.net a disposable or temporary email provider?
No, demon.net is not a disposable or temporary email provider. It is an ISP-provided email service tied to an internet subscription from Demon Internet.
What mail server does demon.net use?
demon.net uses mail servers operated by Demon Internet. Check the MX records section above for specific server details and authentication configuration.
Can I send marketing emails to demon.net addresses?
Yes, you can send marketing emails to demon.net addresses with proper opt-in consent. ISP email providers apply spam filtering, and addresses may become inactive if subscribers cancel their internet service. Regular list verification is recommended.
How do I verify an email address at demon.net?
Use BulkEmailChecker to verify demon.net addresses via SMTP checks. ISP domains may have specific rate limiting or greylisting behaviors. Our tool handles these provider-specific configurations automatically.