TPG is an Australian ISP mailbox. Across 246,811 TPG addresses verified by BounceZero between April and October 2026, 30.1% were invalid, 8.9% catch-all, 5.1% unknown and 53.9% confirmed valid. The invalid share is far above the business average.
The TPG row is all 246,811 addresses verified in the six months to October 2026; the other rows are the benchmarks from the same corpus. Risky and role results fill each row to 100%.
| Segment | Addresses | Invalid | Catch-all | Unknown | Confirmed valid |
|---|---|---|---|---|---|
| TPG | 246,811 | 30.1% | 8.9% | 5.1% | 53.9% |
| 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 TPG row: 2.0%.
TPG is one of the Australian ISP domains that make .au lists the weakest country segment in the corpus. Three in ten tpg.com.au addresses are invalid and almost one in ten sits on a catch-all configuration, so a bounce cannot be predicted from the probe. Australian consumer ISPs churn mailboxes when customers change plans.
TPG is one of Australia's largest consumer broadband providers and its mailboxes are tied to the service contract, so churn follows customer moves between TPG, Telstra and Optus. On Australian SMB lists the domain marks tradespeople and sole traders. Australia's Spam Act requires consent or an existing business relationship for commercial email, with a narrow exception for addresses published for business purposes, which makes the lawful basis the first question for this segment and the bounce rate the second.
On confirmed-invalid rate, TPG ranks 8 of 29 providers in the corpus, just behind Netcom at 32.0%, ahead of Xtra (Spark) at 29.0%.
On unknown rate, TPG ranks 19 of 29 providers in the corpus, just behind Bbox (Bouygues Telecom) at 5.5%, ahead of iCloud Mail at 4.9%.
On confirmed-valid share, TPG ranks 6 of 29 providers in the corpus, just behind Live.nl at 57.3%, ahead of Hotmail Netherlands at 50.3%.
How to read these rates: they are BounceZero's probe outcomes on customer lists over April to October 2026, not a census of TPG 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.
Unknown is a rounding error on TPG at 5.1%; the gateway gives a clear answer and the verdict stands.
More than one in 3 TPG addresses hard-fail. Use the domain as a staleness marker for the whole list, not just the segment.
8.9% of TPG addresses sit behind a catch-all accept. Those cannot be confirmed; send to them only from a secondary domain at low volume.
53.9% of TPG addresses confirmed as deliverable at verification time and can go straight to the primary sequence, with a re-check before every send.
Hold the catch-all share out of cold sends and route confirmed-valid contacts only. For Australian lists, budget for losing a third of ISP addresses on the first verification.
Role addresses such as info@ and sales@ make up 0.0% of TPG addresses in the corpus. Role addresses are rare here, as expected for a mailbox provider.
30.1% of 246,811 TPG addresses verified by BounceZero between April and October 2026 were confirmed invalid, against 14.5% across non-freemail domains and 17.6% across freemail.
5.1%. Unknown means the mailbox could not be confirmed either way, usually because the gateway deferred the probe. BounceZero refunds unknown results; on TPG it is rare enough to re-check once and move on.
Partly: 8.9% of TPG addresses sat behind a catch-all accept, so the server took any address and the mailbox could not be confirmed.
53.9% 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 TPG 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
2,088,148 T-Online addresses verified April to October 2026
159,794 Telefónica addresses verified April to October 2026
21,194 .uk addresses verified April to October 2026
10,998 .us addresses verified April to October 2026
56,582 Windstream addresses verified April to October 2026
36,082 Xtra (Spark) addresses verified April to October 2026
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