Placement index · Week 41, 2026
Sample data
Where email lands, by provider, every week.
StatusThe RoxInbox placement index will publish weekly inbox, promotions and spam rates for each major mailbox provider, measured across the RoxInbox network. The figures below are illustrative sample data that show the format; live measurements start after launch.
Sample data. These numbers are illustrative, not measurements. Do not cite them.
| Provider | Inbox | Placement |
|---|---|---|
| Outlook / M365 | 88% | |
| Google Workspace | 86% | |
| Yahoo | 84% | |
| Zoho | 91% | |
| iCloud | 87% | |
| Mail.ru | 83% | |
| Yandex | 85% | |
| GMX / WEB.DE | 82% | |
| Corporate SMTP | 90% |
Methodology
What is measured. For each provider, the share of test messages that land in the inbox (including tabs such as Promotions, reported separately), in spam or junk, or not at all.
How. Each week, RoxInbox sends test messages from a sample of healthy, fully authenticated sending mailboxes to seed mailboxes at every provider in the network, and reads the folder each copy reached. Messages are ordinary business text with no links or attachments.
Who is included. Only mailboxes past their warm-up ramp, with SPF, DKIM and DMARC passing, are counted, so the index reflects established senders rather than new ones.
Planned sample size. Seeds per provider: TBD. Sending mailboxes per week: TBD. These will be published with the first live index.
Limitations. Seed mailboxes do not behave exactly like your recipients, and placement varies with content, list quality and sending history. Treat the index as a benchmark, not a prediction for your own campaign. Run an inbox placement test for that.
Citing. Once live, the index may be cited with a link to this page and the week shown.
How does your domain compare?
Start with a free domain check, then run a placement test against the same providers.