Email deliverability & inbox placement

Test Email Deliverability Before You Hit Send

See exactly which provider puts you in inbox, tabs or spam. Fix the problems the report flags. Then send for real.

Start with 2 free tests → Read the full review

Tests Gmail · Outlook · Yahoo placement · spam score · 50+ blocklists · SPF/DKIM/DMARC.

How an inbox placement test works

Send to seed inboxes

Copy the generated seed list into your campaign and hit send, just like a normal broadcast.

Scan placement & auth

The tool checks Gmail, Outlook and Yahoo placement, spam score, SPF/DKIM/DMARC and 50+ blocklists.

Fix and re-test

You get a clear report: what landed in spam, why, and what to change before the real send.

Where your email lands, provider by provider

Inbox placement is not one number. The same campaign can hit Primary in Gmail and Junk in Outlook. A real test breaks results down per mailbox provider so you fix the weak spot, not the average.

Gmail

95% inbox

Outlook / Microsoft

74% inbox

Yahoo / AOL

96% inbox

Spam & blocklists

50+ lists checked

What GlockApps actually checks

Inbox Insight

Inbox vs spam vs tabs placement across Gmail, Outlook, Yahoo and AOL, with Google, Barracuda and SpamAssassin spam scores.

Authentication

SPF, DKIM and DMARC validation so providers can verify you and stop spoofing of your domain.

Blocklist monitor

Your sending IP and domain checked against 50+ public blocklists, with alerts when you get listed.

DMARC analyzer

Aggregate DMARC reports turned into readable dashboards — 10,000 free messages a month.

Uptime monitor

Website, blocklist and auth-record monitoring every couple of hours with instant notifications.

Content analysis

Message size, image/text ratio, links and HTML flagged for the things that trip spam filters.

Testing changes the numbers

Senders who test and fix before they broadcast keep far more mail in the inbox. The gap between "send and hope" and "test, fix, send" is the difference between reaching customers and talking to a spam folder.

Approach	Inbox	Spam
With regular testing	95%	5%
Without testing	39%	61%

Illustrative figures from GlockApps marketing material; your own results depend on list quality, content and reputation.

Email placement results: 95% inbox with regular testing vs 39% without

Pricing at a glance

GlockApps starts free and scales with how many tests and seats you need. Verify live pricing at checkout — tiers change.

Tier	Best for	From
Free	Trying it out	2 free spam tests
Essential	Solo senders & small lists	$ low monthly
Growth	Marketing teams & agencies	$$ monthly
Enterprise	High-volume senders	Custom

See full pricing breakdown →

Frequently asked questions

What is an email deliverability test?

It checks whether your email reaches the inbox, lands in the promotions tab, or gets sent to spam across providers like Gmail, Outlook and Yahoo. The report also flags authentication issues and blocklist problems.

How does inbox placement testing work?

You send your campaign to a set of seed mailboxes. The tool checks each one to see where your message landed and returns a per-provider breakdown along with spam-filter scores.

Is GlockApps free to try?

GlockApps offers 2 free deliverability tests so you can see the report format and check your current placement before committing to a paid plan.

Which email providers does GlockApps test?

GlockApps tests placement across Gmail, Outlook, Yahoo, AOL and other major providers, giving you a per-provider inbox vs. spam breakdown.

How often should I test deliverability?

Before every major campaign, after changes to your sending infrastructure, and periodically (weekly or monthly) to catch reputation shifts early.

Evidence & transparency. Checked against public data: GlockApps public feature pages, published filter coverage, marketing material. Not independently tested by us: live test accuracy and real-time support quality. Reader should verify: current free-test count, pricing tiers and feature limits at signup. Last reviewed: June 2026.

See where your emails really land

Run a free deliverability test with GlockApps and check your inbox placement across Gmail, Outlook and Yahoo, plus spam score and blocklist status.

Start with 2 free tests →