.se is the country domain used in Sweden. Across 10,158 .se addresses verified by BounceZero between April and October 2026, 2.0% were invalid, 0.8% catch-all, 2.9% unknown and 92.0% confirmed valid. The verdicts are reliable and can be acted on directly.
The .se row is all 10,158 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 |
|---|---|---|---|---|---|
| .se | 10,158 | 2.0% | 0.8% | 2.9% | 92.0% |
| 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 .se row: 2.3%.
Business-heavy and clean by European standards, with gateways that answer clearly.
Swedish lists are business-heavy, the gateways answer clearly, and the rates are among the cleanest in Europe. Sweden applies the EU rules with consent for individuals and legitimate interest for business contacts. The segment rarely needs more than a verification at import and a quarterly re-check. Swedish companies use .se almost universally, including the large industrial groups, and their mail is hosted mostly on Microsoft and Google, whose gateways answer probes clearly. The small consumer share, on telia.com and similar mailboxes, is where consent applies. Swedish lists are among the few where a bought file can verify above 70 percent confirmed valid when it is less than a year old.
On confirmed-invalid rate, .se ranks 22 of 23 country domains in the corpus, just behind .be at 4.6%, ahead of .it at 1.3%.
On unknown rate, .se ranks 23 of 23 country domains in the corpus, just behind .it at 3.2%.
On confirmed-valid share, .se ranks 1 of 23 country domains in the corpus, ahead of .uk at 65.0%.
How to read these rates: they are BounceZero's probe outcomes on customer lists over April to October 2026, not a census of .se 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 results are rare on .se: the gateway answers probes clearly, so a result you get is a result you can act on.
Confirmed invalid is low at 2.0%, better than the business-list average of 14.5%.
Catch-all is negligible on .se (0.8%); when this provider does return valid, the mailbox accepted the probe itself rather than a blanket accept.
92.0% confirmed valid makes .se one of the most reachable segments in the corpus. Primary-domain sends are safe at the usual thresholds, and re-verification before every send keeps them that way.
Verify at import and act on the verdicts.
Role addresses such as info@ and sales@ make up 1.4% of .se addresses in the corpus. Role addresses rarely reach a person; prefer named contacts.
2.0% of 10,158 .se addresses verified by BounceZero between April and October 2026 were confirmed invalid, against 14.5% across non-freemail domains and 17.6% across freemail.
2.9%. Unknown means the mailbox could not be confirmed either way, usually because the gateway deferred the probe. BounceZero refunds unknown results; on .se it is rare enough to re-check once and move on.
Not in practice: 0.8% of .se addresses returned catch-all, so a valid verdict means the mailbox exists.
92.0% 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 .se 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
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246,811 TPG addresses verified April to October 2026
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