Universal inbox refreshes every 15 minutes when the Inbox tab is open in your browser. Per-mailbox view is live — no cadence, it queries IMAP each time you open a mailbox's detail panel. External mailboxes sync at the same 15-minute cadence as native ones. There's no push-based instant-sync currently.
Sync cadence details
- Universal inbox — every 15 minutes while tab is open. Catches up on tab open. The displayed message list also refreshes from cache about every 30 seconds, so new mail that already synced appears without a full re-sync.
- Per-mailbox view — live, no cadence.
- External mailboxes — same 15-minute cadence in universal inbox mode.
- Warming metrics — updated in near-real-time (< 5 minutes) via a separate pipeline.
- DNS health checks — periodic scheduled recheck (not tied to inbox sync).
Traffic and cost implications
Sync respects IMAP rate limits for each mailbox. For Gmail App Password mailboxes especially, going faster than 15 minutes would risk hitting rate limits. Winnr's cadence is tuned to stay well within safe limits for every supported provider.
Universal inbox usage doesn't count against any billing metric — no per-sync fee, no bandwidth charge. Included in your plan.
What's next
Frequently asked questions
Can I force an immediate refresh?
Yes — a Refresh button at the top of the Inbox page pulls the latest state on demand. Handy if you just sent a test and want to see the reply.
What if my tab isn't open?
Universal inbox sync only runs while the tab is active — this prevents excessive background work. If you don't open it for a day, the next open triggers a catch-up sync.
Are messages missed?
No. IMAP is idempotent — every unfetched message shows up on the next sync. You might see a slight delay, but nothing is lost.
Is 15 minutes configurable?
Not currently. It's tuned to balance freshness with server load. If you need more frequent sync, use the Refresh button on-demand.
Why not real-time IMAP push?
Push is on the roadmap. Currently, most sending tools have their own push-based reply detection you can layer on top of Winnr — those give you real-time. Winnr's sync is for background auditing.