Domain Intelligence
Last Updated:
Primus.com.au
Proceed With Care
Primus.com.au is operated by Primus Australia. The domain runs 2 mail exchanges and SMTP is responsive, with 2 of 3 authentication standards in place.
Proceed With Care
RISK
33
/100
Medium
Verify Mailbox
Verify @primus.com.au emails
Live SMTP handshake against primus.com.au 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
Disposable detection is the strongest I've tested. We were drowning in fake signups before integration. Fraudulent account creation dropped roughly 80% in the first 10 days. Risk score on the lookup pages helps our analysts triage faster too. Elena Reyes · Trust & Safety, Fintech
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
2
Mail exchangers
Mail Exchange (MX) Records for primus.com.au 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
mx.syd.iprimus.com.au 203.134.71.81
Reachable
#10
mx.mel.iprimus.com.au 203.134.153.81
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 mx683.syd.oss-core.net ESMTP
Primary mail server accepted SMTP connection and returned a banner during the live audit.
primus.com.au 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 include:oss-core.net include:spf.au-east.atmailcloud.com ~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 primus.com.au.
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.
Quarantine
TXTv=DMARC1;p=quarantine;adkim=s;aspf=s
Receivers are instructed to quarantine (route to spam) any mail that fails SPF or DKIM.
primus.com.au Domain Registration WHOIS · Nameservers · Registrar
RegistrarSynergy Wholesale Accreditations Pty Ltd
IANA ID1609
Last UpdatedFebruary 8, 2026
TLD.au
Authoritative Nameservers (2)
- ns2.iprimus.com.au
- ns1.iprimus.com.au
Registrant
Jamie Gray
PRIMUS TELECOMMUNICATIONS PTY LIMITED
Technical Contact
Jamie Gray
About this Domain
About primus.com.au
primus.com.au is the email domain for Primus Telecom, an Australian telecommunications company. Primus provided broadband internet, phone, and business services to Australian customers before being acquired by Vocus Group (now Vocus Communications). Legacy primus.com.au email accounts continue to be maintained.
primus.com.au supports SPF authentication through Vocus infrastructure. DKIM and DMARC configurations are maintained at standard levels.
The primus.com.au mail servers, managed by Vocus, validate recipients and apply standard anti-spam filtering.
For delivery to primus.com.au, authenticate with SPF and DKIM, maintain clean lists, and comply with the Australian Spam Act 2003.
Other Domains Similar to primus.com.au
Other isp email provider domains we've audited. Click any one to see its MX records, authentication, and risk score.
btinternet.com
BT Group
bellsouth.net
AT&T BellSouth
xs4all.nl
XS4ALL
dna.fi
DNA Oyj
dreamwiz.com
Dreamwiz
kabeldeutschland.de
Kabel Deutschland
shentel.net
Shenandoah Telecommunications
optimum.net
Altice USA
cincinnatibel.com
Cincinnati Bell
ntt.com
NTT Communications
magenta.at
Magenta Telekom Austria
arnet.com.ar
Arnet (Telecom Argentina)
mediacom.net
Mediacom Communications
telecomitalia.it
Telecom Italia
suddenlink.net
Altice USA
tesco.net
Tesco Internet
btconnect.com
BT Connect
paran.com
Paran (KTF)
windstream.net
Windstream Holdings
adam.com.au
Adam Internet
More Email Verification Tools
Free single-address checks, bulk uploads, and APIs for plugging email verification into your own product.
Common Questions About primus.com.au
Is primus.com.au a disposable or temporary email provider?
No. primus.com.au is not a disposable email provider. It is classified as ISP Email Provider operated by Primus Australia and addresses on primus.com.au are persistent rather than throwaway. Mail sent to a valid primus.com.au mailbox reaches a real recipient.
How do I verify if a primus.com.au email address is valid?
The fastest way to verify a primus.com.au email address is to use our free email checker. Enter any @primus.com.au mailbox at the top of this page and our system performs a real-time SMTP handshake against primus.com.au'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 primus.com.au email exists without sending a message?
Yes. Our real-time email verification API connects directly to primus.com.au'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 primus.com.au mailbox is valid, full, or non-existent. The recipient never receives anything and never sees the check.
What are the MX records for primus.com.au?
primus.com.au currently publishes 2 mail exchange (MX) records. The primary MX is mx.syd.iprimus.com.au, which is the first server contacted when other mail systems try to deliver email to a primus.com.au 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 primus.com.au.
Does primus.com.au use SPF, DKIM, and DMARC email authentication?
primus.com.au has 2 of the 3 standard email authentication records in place: SPF, and DMARC (policy: quarantine). Adding the missing layer(s) would tighten anti-spoofing protection and improve deliverability for legitimate primus.com.au mail.
Why do emails to primus.com.au bounce or get blocked?
Bounces from primus.com.au 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 primus.com.au'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 primus.com.au's receivers trust you.
How can I verify a large list of primus.com.au email addresses?
Our bulk email verifier accepts CSV or TXT uploads with thousands or millions of primus.com.au addresses (or any mix of domains). Every address goes through 30+ checks including SMTP existence, primus.com.au 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 primus.com.au email addresses?
Yes, with normal hygiene. primus.com.au is a legitimate email service and signups from @primus.com.au 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 primus.com.au by default.
What email format does primus.com.au use for usernames?
Most primus.com.au mailboxes follow common patterns like first.last@primus.com.au, firstinitiallast@primus.com.au, or first@primus.com.au, but the actual local-part rules depend on Primus Australia. The only reliable way to confirm whether a specific @primus.com.au 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 primus.com.au risk score calculated?
The 0-to-100 risk score for primus.com.au 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 primus.com.au score is recomputed on every audit so it always reflects the live state of the domain.
Is primus.com.au a valid email domain?
Yes, primus.com.au is a valid email domain originally operated by Primus Telecom, now maintained by Vocus Communications. Legacy accounts remain active for Australian subscribers.
Is primus.com.au a disposable or temporary email service?
No, primus.com.au is not a disposable or temporary email service. It is a permanent ISP email domain maintained by Vocus for former Primus subscribers in Australia.
What mail servers does primus.com.au use?
primus.com.au uses mail servers managed by Vocus Communications infrastructure. The MX records direct inbound email to Vocus gateways for filtering and delivery.
Can I send marketing emails to primus.com.au addresses?
You can send marketing emails to primus.com.au addresses with valid opt-in consent. Authenticate with SPF and DKIM, comply with the Australian Spam Act 2003, and honor unsubscribe requests.
How do I verify a primus.com.au email address?
You can verify a primus.com.au email address using an email verification tool that checks MX records and performs SMTP-level validation to confirm the mailbox is active.