Inbox Insight is GlockApps' core product — the tool that tells you whether your email lands in inbox or spam, broken down by provider, before you send to real subscribers.
How it works
Create a test. Paste your email content or connect your ESP.
Send to seed list. GlockApps gives you a list of seed addresses across Gmail, Outlook, Yahoo and AOL. Send your campaign to those addresses.
Get the report. Within minutes, you see where each seed landed: inbox, spam, tabs (Gmail) or missing.
What the report includes
Per-provider inbox/spam/tabs breakdown
Overall inbox placement percentage
Spam scores from Google, Barracuda and SpamAssassin
SPF, DKIM and DMARC authentication pass/fail
Sending IP reputation and 50+ blocklist check
Content flags: image-to-text ratio, link issues, HTML problems
Run an Inbox Insight test free — 2 tests included, no card needed.
A single spam score tells you nothing about provider-specific filtering. Your email can land in Primary on Gmail and Junk on Outlook — a single-score tool would not catch that. Per-provider data lets you fix the specific problem at the specific provider.
When to use Inbox Insight
Before every major broadcast
After changing ESP, domain or IP
After warming up a new domain (verify the warmup worked)
When open rates drop suddenly
Evidence & transparency. Checked against public data: GlockApps Inbox Insight feature page and report screenshots. Not independently tested by us: real-time seed-list coverage and report latency. Reader should verify: current seed-list size and provider coverage at signup. Last reviewed: June 2026.
Frequently asked questions
How fast does Inbox Insight return results?
Most reports complete within a few minutes of sending. Delivery time to seed mailboxes depends on your sending infrastructure.
Does it test Gmail tabs (Primary, Promotions)?
Yes. The report breaks Gmail placement into Primary, Promotions, Social and Spam.