Mail-Tester vs GlockApps (2026)
Mail-Tester scores your email against SpamAssassin. GlockApps places it in real Gmail, Outlook, and Yahoo mailboxes. Different problems, different price points. Here is which one your workflow actually needs.
GlockApps wins for inbox placement at Gmail, Outlook, and Yahoo, plus DMARC monitoring across multiple domains. Mail-Tester is the free option for SpamAssassin pre-send checks: 3 tests per day, no account required.
Quick Routing
SpamAssassin score or real inbox placement: which do you need?
One question decides this: are you checking spam score before a send, or diagnosing where emails actually land at Gmail and Outlook? These tools solve different problems at different price points.
Feature Analysis
SpamAssassin score vs. real inbox placement: what each tool tests
Mail-Tester generates a score from 0 to 10 against SpamAssassin and checks SPF alignment, DKIM signature, DMARC policy, and basic HTML structure. The output is a one-page report with line-item issues to fix before send.
GlockApps places your test email into real seed mailboxes at Gmail, Google Workspace, Outlook, Yahoo, and Barracuda, then reports inbox vs. spam placement per provider. Each test consumes credits from your plan.
Mail-Tester catches authentication and spam-word issues before send. GlockApps tells you actual ISP-level inbox vs. spam placement. They are complementary, not redundant.
Side-by-Side
Mail-Tester vs GlockApps: key differences
| Mail-Tester | GlockApps | |
|---|---|---|
| Best for | Quick pre-send SpamAssassin checks | Inbox placement testing and DMARC monitoring |
| Starting price | Free (3 tests/day) | $0 free / $59/mo paid |
| Inbox placement (Gmail, Outlook, Yahoo) | ✗ | ✓ |
| SpamAssassin score | ✓ | ✓ |
| DMARC analytics | ✗ | ✓ |
| Blocklist monitoring (50+ lists) | ✗ | ✓ |
| API access | Paid plans only | ✓ (API 2.0) |
| White-label PDF reports | ✗ | ✓ |
| Google Postmaster integration | ✗ | ✓ |
| G2 rating | Not confirmed | 4.6/5 (100+ reviews) |
Mail-Tester paid plan details are not publicly listed. GlockApps prices reflect annual billing. Verify current pricing at each tool's website before committing.
Strengths and Limits
Mail-Tester vs GlockApps: wins and limits
Mail-Tester
GlockApps
Pricing
Mail-Tester vs GlockApps: cost at every tier
Mail-Tester is free for up to 3 tests per day with no account required. Paid plans add API access and higher test volume, but pricing details are not publicly listed. GlockApps is tiered by spam test credits, DMARC message volume, and sending accounts monitored.
| Plan | Tool | Price/mo | Spam test credits | Sending accounts | DMARC messages/mo |
|---|---|---|---|---|---|
| Free | Mail-Tester | $0 | 3 tests/day | 1 | N/A |
| Paid | Mail-Tester | Not listed publicly | Higher volume + API | N/A | N/A |
| Free | GlockApps | $0 | 2/mo | 1 | 10,000 |
| Essential | GlockApps | $59/mo | 360/mo | 1 | 600,000 |
| Growth | GlockApps | $99/mo | 1,080/mo | 10 | 1,200,000 |
| Enterprise | GlockApps | $129/mo | 1,800/mo | 20 | 12,000,000 |
Exceeding monthly DMARC message limits triggers fees: $7.50 per 100k on Essential, $5 on Growth, $2 on Enterprise. Audit your message count before selecting a plan.
Final Take
GlockApps for scale, Mail-Tester for free checks
Mail-Tester is the pick for solo senders and SDRs who need a fast pre-send authentication check. It catches SPF, DKIM, and spam-trigger issues for free, three tests per day.
GlockApps is for agencies with multiple client domains and RevOps teams managing multi-provider outbound at scale. If Mail-Tester scores clean but emails still hit spam, GlockApps shows which ISP is blocking and why.
Common Questions
4 questions: Mail-Tester vs GlockApps
They test different things: Mail-Tester scores SpamAssassin pre-send, GlockApps shows real inbox placement at Gmail, Outlook, and Yahoo. Choose based on which problem you are solving.
Yes. Mail-Tester handles daily pre-send spam checks at zero cost; GlockApps audits actual ISP-level placement before major campaigns. They cover different layers of deliverability.
Mail-Tester is free for 3 tests per day with no account needed. GlockApps starts free (2 credits/mo), then $59/mo Essential for 360 tests and full DMARC monitoring.
No. Mail-Tester tests SpamAssassin only. For real Gmail, Outlook, or Yahoo inbox vs. spam placement data, GlockApps is required.
Ready to see where your emails actually land?
GlockApps starts free: 2 spam test credits and 10,000 DMARC messages per month. No credit card required.
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