.ch is the country domain used in Switzerland. Across 30,522 .ch addresses verified by BounceZero between April and October 2026, 9.3% were invalid, 0.3% catch-all, 36.0% unknown and 19.6% confirmed valid. Unknown dominates because the gateway defers probes.
The .ch row is all 30,522 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 |
|---|---|---|---|---|---|
| .ch | 30,522 | 9.3% | 0.3% | 36.0% | 19.6% |
| 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% |
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 .ch row: 34.9%.
The main Swiss consumer gateway defers most probes, so unknowns dominate and confirmed valid is rare.
Swiss lists are dominated by Swisscom's bluewin.ch, whose gateway defers most probes, so unknowns dominate the country segment and confirmed-valid is rare. Swiss company domains verify normally. Switzerland is outside the EU framework; its own law prohibits unsolicited mass email without consent, and the revised Federal Act on Data Protection treats these as personal data, which makes the consumer segment consent-only.
On confirmed-invalid rate, .ch ranks 18 of 23 country domains in the corpus, just behind .in at 10.7%, ahead of .at at 8.5%.
On unknown rate, .ch ranks 3 of 23 country domains in the corpus, just behind .de at 41.2%, ahead of .at at 29.1%.
On confirmed-valid share, .ch ranks 21 of 23 country domains in the corpus, just behind .net at 19.9%, ahead of .de at 16.5%.
How to read these rates: they are BounceZero's probe outcomes on customer lists over April to October 2026, not a census of .ch 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.
36.0% unknown is the story of .ch: the gateway defers probes, and the mailboxes behind them can only be tested by a careful send.
Only 9.3% of .ch addresses hard-fail, against 14.5% across non-freemail domains.
Catch-all is negligible on .ch (0.3%); when this provider does return valid, the mailbox accepted the probe itself rather than a blanket accept.
Confirmed valid is 19.6%. Send to that slice from the primary domain and treat the rest of the .ch segment as unreachable by cold email.
Note the risky and role share: 34.9% of .ch results landed there, which the four headline columns do not show. Read risky as 'deliverable but with a flag' and test it at low volume before trusting it.
Use a warm low-volume send to test Swiss ISP addresses; verification alone will not clear them.
Role addresses such as info@ and sales@ make up 0.9% of .ch addresses in the corpus. Role addresses rarely reach a person; prefer named contacts.
9.3% of 30,522 .ch addresses verified by BounceZero between April and October 2026 were confirmed invalid, against 14.5% across non-freemail domains and 17.6% across freemail.
36.0%. 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.
Not in practice: 0.3% of .ch addresses returned catch-all, so a valid verdict means the mailbox exists.
19.6% 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 .ch 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
8,450 .br addresses verified April to October 2026
7,561 .ca addresses verified April to October 2026
6,159 .co addresses verified April to October 2026
2,158,955 .com addresses verified April to October 2026
2,095,440 .de addresses verified April to October 2026
65,636 EarthLink addresses verified April to October 2026
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