Domain Intelligence
Last Updated:
Supanet.com
Proceed With Care
Supanet.com is operated by Supanet. The domain runs 1 mail exchange and SMTP is responsive, with 1 of 3 authentication standards in place.
Proceed With Care
RISK
39
/100
Medium
Verify Mailbox
Verify @supanet.com emails
Live SMTP handshake against supanet.com 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
We had a sender reputation crisis after a list import went badly. Used the bulk verifier to scrub everything, then plugged the API into our signup form. Took deliverability from 73% to 96% over six weeks. Sarah Knowles · Email Marketing 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 supanet.com 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
inbound.mail.netline.net.uk 213.40.180.222
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-This is a www.supanet.com mail server Wed, 13 May 2026 18:10:39 +0100
Primary mail server accepted SMTP connection and returned a banner during the live audit.
supanet.com 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 mx a ip4:213.40.180.0/24 ip4:213.40.190.0/24 ip4:213.40.195.0/24 -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 supanet.com.
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.supanet.com.
No DMARC policy is published. Receivers have no instruction for handling failed messages from this domain.
supanet.com Domain Registration WHOIS · Nameservers · Registrar
RegistrarNetwork Solutions, LLC
IANA ID2
RegisteredSeptember 7, 1999
Last UpdatedJune 13, 2024
ExpiresSeptember 7, 2026
Age26 years
TLD.com
Authoritative Nameservers (2)
- NSX.DNS.NETLINE.NET.UK
- NSY.DNS.NETLINE.NET.UK
Registrant
Statutory Masking Enabled
Statutory Masking Enabled
dataprotected@maskeddetails.com·Statutory Masking Enabled, Burnley, UNITED STATES
Technical Contact
Statutory Masking Enabled
Statutory Masking Enabled
dataprotected@maskeddetails.com·Statutory Masking Enabled, Statutory Masking Enabled, UNITED STATES
About this Domain
About supanet.com
supanet.com is the email domain for Supanet, a UK internet service and web portal. Supanet has provided email, search, and online services to UK users. The supanet.com email domain continues to serve users with email accounts.
supanet.com supports SPF records for sender authentication. DKIM and DMARC configurations follow standard UK ISP practices.
The supanet.com mail servers validate recipients and apply standard anti-spam filtering.
For delivery to supanet.com, authenticate with SPF and DKIM, maintain clean lists, and comply with UK GDPR and PECR for commercial email.
Other Domains Similar to supanet.com
Other isp email provider domains we've audited. Click any one to see its MX records, authentication, and risk score.
gvt.com.br
GVT (Global Village Telecom)
armstrong.net
Armstrong Utilities
telefonica.com
Telefonica
bluemail.de
Bluemail Germany
htc.net
HTC Communications
antietam.net
Antietam Broadband
cablevision.com
Altice USA
chello.at
Chello Austria
zen.co.uk
Zen Internet
casema.nl
Casema
eftel.com.au
Eftel
persona.ca
Persona Communications
infoweb.ne.jp
InfoWeb (Fujitsu)
a1.at
A1 Telekom Austria
online.nl
Online.nl
ctc.net
Citizens Telephone Company
nordnet.fr
Nordnet
att.net
AT&T Inc.
planet.nl
Planet Internet
sky.com
Sky Group
More Email Verification Tools
Free single-address checks, bulk uploads, and APIs for plugging email verification into your own product.
Common Questions About supanet.com
Is supanet.com a disposable or temporary email provider?
No. supanet.com is not a disposable email provider. It is classified as ISP Email Provider operated by Supanet and addresses on supanet.com are persistent rather than throwaway. Mail sent to a valid supanet.com mailbox reaches a real recipient.
How do I verify if a supanet.com email address is valid?
The fastest way to verify a supanet.com email address is to use our free email checker. Enter any @supanet.com mailbox at the top of this page and our system performs a real-time SMTP handshake against supanet.com'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 supanet.com email exists without sending a message?
Yes. Our real-time email verification API connects directly to supanet.com'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 supanet.com mailbox is valid, full, or non-existent. The recipient never receives anything and never sees the check.
What are the MX records for supanet.com?
supanet.com currently publishes 1 mail exchange (MX) record. The primary MX is inbound.mail.netline.net.uk, which is the first server contacted when other mail systems try to deliver email to a supanet.com 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 supanet.com.
Does supanet.com use SPF, DKIM, and DMARC email authentication?
supanet.com has 1 of the 3 standard email authentication records in place: SPF and . Adding the missing layer(s) would tighten anti-spoofing protection and improve deliverability for legitimate supanet.com mail.
Why do emails to supanet.com bounce or get blocked?
Bounces from supanet.com 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 supanet.com'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 supanet.com's receivers trust you.
How can I verify a large list of supanet.com email addresses?
Our bulk email verifier accepts CSV or TXT uploads with thousands or millions of supanet.com addresses (or any mix of domains). Every address goes through 30+ checks including SMTP existence, supanet.com 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 supanet.com email addresses?
Yes, with normal hygiene. supanet.com is a legitimate email service and signups from @supanet.com 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 supanet.com by default.
What email format does supanet.com use for usernames?
Most supanet.com mailboxes follow common patterns like first.last@supanet.com, firstinitiallast@supanet.com, or first@supanet.com, but the actual local-part rules depend on Supanet. The only reliable way to confirm whether a specific @supanet.com 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 supanet.com risk score calculated?
The 0-to-100 risk score for supanet.com 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 supanet.com score is recomputed on every audit so it always reflects the live state of the domain.
Is supanet.com a valid email domain?
Yes, supanet.com is a valid email domain operated by Supanet, a UK internet service and web portal providing email services to British users.
Is supanet.com a disposable or temporary email service?
No, supanet.com is not a disposable or temporary email service. It is a permanent email domain serving UK internet users with ongoing email accounts.
What mail servers does supanet.com use?
supanet.com uses mail servers within UK internet infrastructure. The MX records direct inbound email to Supanet gateways for filtering and delivery.
Can I send marketing emails to supanet.com addresses?
You can send marketing emails to supanet.com addresses with valid opt-in consent. Authenticate with SPF and DKIM, comply with UK GDPR and PECR, and honor unsubscribe requests.
How do I verify a supanet.com email address?
You can verify a supanet.com email address using an email verification service that checks MX records and performs SMTP-level validation to confirm the mailbox is active.