iiNet is an Australian ISP mailbox. Across 64,161 iiNet addresses verified by BounceZero between April and October 2026, 2.8% were invalid, 12.4% catch-all, 65.5% unknown and 18.9% confirmed valid. Unknown dominates because the gateway defers probes.
Every iiNet address BounceZero verified for customers between April and October 2026, beside the corpus benchmarks. The remainder of each row to 100% is risky and role results.
| Segment | Addresses | Invalid | Catch-all | Unknown | Confirmed valid |
|---|---|---|---|---|---|
| iiNet | 64,161 | 2.8% | 12.4% | 65.5% | 18.9% |
| All non-freemail domains (business and ISP) | 6,514,884 | 14.5% | 2.3% | 27.0% | 32.6% |
| Business domains only (consumer ISP and freemail excluded) | 1,269,919 | 22.9% | 9.4% | 22.5% | 40.3% |
| All freemail | 1,415,154 | 17.6% | 1.1% | 2.1% | 74.0% |
| All .au addresses | 560,378 | 36.5% | 6.3% | 17.6% | 37.3% |
Non-freemail includes consumer ISP mailboxes; a business-only cut is on the benchmarks page. Method and every other cut: Lead List Quality Benchmarks 2026. Risky and role on the iiNet row: 0.4%.
iiNet runs a catch-all style gateway for a share of its customers and defers most other probes, so the result mix is dominated by unknown and catch-all. Confirmed invalid is low only because the gateway rarely says no. This is the Australian ISP most likely to accept a guessed address and bounce it later.
iiNet grew by acquiring smaller Australian ISPs and inherited a patchwork of mail systems, which is why its gateway behaves inconsistently: some mailboxes sit on a catch-all accept, others defer. The domain is common on Western Australian and South Australian SMB lists. Australia's Spam Act applies, and the catch-all share means a finder's guess at an iiNet address cannot be trusted without a test send.
On confirmed-invalid rate, iiNet ranks 26 of 29 providers in the corpus, just behind Gmail at 3.5%, ahead of Bluewin (Swisscom) at 2.4%.
On unknown rate, iiNet ranks 4 of 29 providers in the corpus, just behind PeoplePC at 85.8%, ahead of Luukku at 49.8%.
On confirmed-valid share, iiNet ranks 15 of 29 providers in the corpus, just behind iCloud Mail at 20.0%, ahead of SBCGlobal at 18.0%.
How to read these rates: they are BounceZero's probe outcomes on customer lists over April to October 2026, not a census of iiNet mailboxes. Unknown and catch-all measure what verification could not confirm, which depends on the provider's gateway policy during the window as much as on the addresses. The lists are the ones customers chose to upload, so segments dominated by a few large uploads carry their age and source. Method and limitations: benchmarks page.
iiNet defers the majority of probes, so unknown dominates. Plan the segment around a warm, low-volume send from a secondary domain and let the bounce report decide.
At 2.8%, iiNet loses fewer addresses to hard failures than almost any segment; the ones that fail are typos and closed accounts.
Catch-all is the defining trait here: 12.4% of iiNet addresses accept anything, so finder guesses look valid and bounce later. Hold them out of cold sequences entirely.
Confirmed valid is 18.9%. Send to that slice from the primary domain and treat the rest of the iiNet segment as unreachable by cold email.
Treat iinet.net.au catch-all results as unconfirmed. Send to them only from a secondary domain at low volume, and watch the bounce report closely for the first hundred sends.
Role addresses such as info@ and sales@ make up 0.0% of iiNet addresses in the corpus. Role addresses are rare here, as expected for a mailbox provider.
2.8% of 64,161 iiNet addresses verified by BounceZero between April and October 2026 were confirmed invalid, against 14.5% across non-freemail domains and 17.6% across freemail.
65.5%. Unknown means the mailbox could not be confirmed either way, usually because the gateway deferred the probe. BounceZero refunds unknown results; re-check after a week or use a second channel.
Partly: 12.4% of iiNet addresses sat behind a catch-all accept, so the server took any address and the mailbox could not be confirmed.
18.9% confirmed valid at verification time. Keep bounces under 2% and complaints under 0.3% on the send, and re-verify the segment before every send.
Upload the file and see valid, invalid, catch-all and unknown per row, with the iiNet segment against this benchmark. 100 free checks a month, unknowns refunded.
Ayoub built BounceZero's 5-stage validation pipeline, its dedicated BGP-announced IP infrastructure, and the Patroni HA PostgreSQL cluster behind every verification. Previously built high-volume email delivery infrastructure. Trained at 1337 Benguerir (École 42 network, 2019). Open-source: bgp_analyzer.
Invalid, catch-all and unknown rates per email provider and country domain, 2026
34,790 Hotmail Netherlands addresses verified April to October 2026
50,895 iCloud Mail addresses verified April to October 2026
7,976 .in addresses verified April to October 2026
29,328 iPrimus addresses verified April to October 2026
1,193,715 .it addresses verified April to October 2026
22,084 Netcom (EarthLink) addresses verified April to October 2026
Continue through related topics