Domain Intelligence
Last Updated:
Xtra.co.nz
Proceed With Care
Xtra.co.nz is operated by Spark NZ. The domain runs 1 mail exchange and SMTP is responsive, with 2 of 3 authentication standards in place.
Proceed With Care
RISK
33
/100
Medium
Verify Mailbox
Verify @xtra.co.nz emails
Live SMTP handshake against xtra.co.nz 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
Switched after a billing dispute with NeverBounce. Same SMTP results on a 5k test sample. The MX, SPF, DKIM lookup tools are a hidden value-add for debugging client deliverability complaints. James Wexler · Growth Engineer
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 xtra.co.nz 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
mx.xm.smxcloud.com 210.55.143.33
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 mx.xtra.co.nz ESMTP server ready
Primary mail server accepted SMTP connection and returned a banner during the live audit.
xtra.co.nz 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 ip4:210.55.143.48/29 ~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 xtra.co.nz.
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.
None
TXTv=DMARC1; p=none; sp=reject; rua=mailto:rua@dmarc.xtra.co.nz
Monitoring only. Receivers take no action when SPF or DKIM fails.
xtra.co.nz Domain Registration WHOIS · Nameservers · Registrar
TLD.co.nz
Authoritative Nameservers (4)
- ns-297.awsdns-37.com
- ns-838.awsdns-40.net
- ns-1109.awsdns-10.org
- ns-1689.awsdns-19.co.uk
About this Domain
About xtra.co.nz
xtra.co.nz is a New Zealand email domain operated by Spark NZ (formerly Telecom NZ), New Zealand's largest telecommunications company. The Xtra brand provided email and internet services to NZ consumers, and existing accounts continue through Spark's Yahoo-partnered email infrastructure.
xtra.co.nz operates through a partnership with Yahoo, benefiting from Yahoo's authentication infrastructure with SPF, DKIM, and DMARC. The service complies with New Zealand's Privacy Act.
The xtra.co.nz mail servers enforce recipient verification and reject invalid addresses. The domain does not operate as catch-all. Yahoo's filtering applies.
For delivery to xtra.co.nz, authenticate with SPF, DKIM, and DMARC. Comply with New Zealand's Unsolicited Electronic Messages Act.
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Common Questions About xtra.co.nz
Is xtra.co.nz a disposable or temporary email provider?
No. xtra.co.nz is not a disposable email provider. It is classified as Free Email Provider operated by Spark NZ and addresses on xtra.co.nz are persistent rather than throwaway. Mail sent to a valid xtra.co.nz mailbox reaches a real recipient.
How do I verify if a xtra.co.nz email address is valid?
The fastest way to verify a xtra.co.nz email address is to use our free email checker. Enter any @xtra.co.nz mailbox at the top of this page and our system performs a real-time SMTP handshake against xtra.co.nz'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 xtra.co.nz email exists without sending a message?
Yes. Our real-time email verification API connects directly to xtra.co.nz'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 xtra.co.nz mailbox is valid, full, or non-existent. The recipient never receives anything and never sees the check.
What are the MX records for xtra.co.nz?
xtra.co.nz currently publishes 1 mail exchange (MX) record. The primary MX is mx.xm.smxcloud.com, which is the first server contacted when other mail systems try to deliver email to a xtra.co.nz 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 xtra.co.nz.
Does xtra.co.nz use SPF, DKIM, and DMARC email authentication?
xtra.co.nz has 2 of the 3 standard email authentication records in place: SPF, and DMARC (policy: none). Adding the missing layer(s) would tighten anti-spoofing protection and improve deliverability for legitimate xtra.co.nz mail.
Why do emails to xtra.co.nz bounce or get blocked?
Bounces from xtra.co.nz 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 xtra.co.nz'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 xtra.co.nz's receivers trust you.
How can I verify a large list of xtra.co.nz email addresses?
Our bulk email verifier accepts CSV or TXT uploads with thousands or millions of xtra.co.nz addresses (or any mix of domains). Every address goes through 30+ checks including SMTP existence, xtra.co.nz 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 xtra.co.nz email addresses?
Yes, with normal hygiene. xtra.co.nz is a legitimate email service and signups from @xtra.co.nz 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 xtra.co.nz by default.
What email format does xtra.co.nz use for usernames?
Most xtra.co.nz mailboxes follow common patterns like first.last@xtra.co.nz, firstinitiallast@xtra.co.nz, or first@xtra.co.nz, but the actual local-part rules depend on Spark NZ. The only reliable way to confirm whether a specific @xtra.co.nz 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 xtra.co.nz risk score calculated?
The 0-to-100 risk score for xtra.co.nz 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 xtra.co.nz score is recomputed on every audit so it always reflects the live state of the domain.
Is xtra.co.nz a valid email domain?
Yes, xtra.co.nz is a valid free email domain operated by Spark NZ. It provides permanent email accounts to users.
Is xtra.co.nz a disposable or temporary email provider?
No, xtra.co.nz is not a disposable or temporary email provider. It offers permanent email accounts with standard email features.
What mail server does xtra.co.nz use?
xtra.co.nz uses mail servers operated by Spark NZ. Check the MX records section above for specific server details.
Can I send marketing emails to xtra.co.nz 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 xtra.co.nz?
Use BulkEmailChecker to verify xtra.co.nz addresses via SMTP checks. Verification behavior varies by provider. Our tool handles provider-specific rate limiting automatically.