GlockApps is an email deliverability testing and monitoring platform that allows email marketers, developers, and deliverability specialists to test where their emails land across 60+ major email providers, diagnose authentication issues, monitor blacklists, and track sender reputation — all from a single dashboard purpose-built for deliverability troubleshooting.
Product Overview
GlockApps is the specialist tool for diagnosing and resolving email deliverability problems before they affect campaign performance at scale. Its Inbox Insight test sends a copy of the email to a network of real seed email accounts at Gmail, Yahoo, Outlook, Apple Mail, AOL, and 50+ other providers — then reports exactly where the email landed (inbox, spam, promotions, updates tab) at each provider. This multi-provider placement test reveals provider-specific deliverability problems that are invisible when testing from a single inbox. GlockApps's SPAM Test analyses the email content and headers, running it through the major spam filter engines (SpamAssassin, Barracuda, SpamCop) and generating a score with specific recommendations for improving it. Its Authentication Check validates SPF, DKIM, and DMARC configuration against best practices — a common source of deliverability problems that is easy to misconfigure but hard to diagnose without specialist tooling. The Blacklist Monitor watches 50+ major IP and domain blacklists for the sender's IP addresses and domains, sending immediate alerts if a blacklisting event occurs.
Key Features
- Inbox Placement Testing: Send test emails to 60+ provider seed accounts — see exactly where your email lands (inbox, spam, promotions) at each ISP.
- Spam Filter Analysis: Run emails through SpamAssassin, Barracuda, and other major filters — identify and fix content triggers before sending live campaigns.
- Authentication Check: Validate SPF, DKIM, and DMARC configuration — identify and resolve authentication misconfigurations that cause deliverability failures.
- Blacklist Monitor: Monitor 50+ major IP and domain blacklists — receive immediate alerts when a blacklisting event affects your sending infrastructure.
- DMARC Analytics: Analyse DMARC aggregate reports — identify unauthorised sources sending on behalf of your domain and phishing attempts.
Best For
Email marketers, developers, and deliverability specialists that need to diagnose provider-specific inbox placement issues, validate email authentication configuration, and monitor sending reputation across multiple IP addresses and domains.
Pricing
Free (limited tests). Starter: $9/month. Essential: $29/month. Scale: $59/month. Pay-per-test also available.
Key Integrations
Mailchimp, SendGrid, Mailgun, Postmark, Amazon SES, Campaign Monitor, Klaviyo, ActiveCampaign, HubSpot, Zapier
Pros
- 60+ provider inbox placement testing — most comprehensive multi-ISP seed network in the category
- Spam filter analysis with actionable recommendations — not just a score but specific fixes
- DMARC analytics provide security monitoring alongside deliverability testing
- Affordable pricing with pay-per-test option for teams with variable testing needs
Cons
- No email warmup capability — pure testing and monitoring, not reputation building
- Less polished UI than newer deliverability platforms — functional but dated interface
- Advanced DMARC reporting requires a higher-tier plan
RevOps Jobs-to-Be-Done
- Email Deliverability Testing — Test where emails land across 90+ email clients and spam filters before sending to campaigns, identifying issues before they impact deliverability. KPI: Improve email deliverability rates by 15–30% by identifying and fixing spam filter triggers before campaigns go live
- Spam Filter and Blocklist Monitoring — Monitor your sending domains and IPs across 50+ major blocklists with real-time alerts when listings are detected. KPI: Reduce impact of blocklist incidents by detecting and remediating within hours instead of days
- Email Preview Across Clients — Preview how emails render across Gmail, Outlook, Apple Mail, and mobile devices to catch rendering issues before send. KPI: Eliminate rendering-related unsubscribes and improve campaign engagement with pixel-perfect cross-client previews
How It Fits Your Stack
Primary system of record: Email platforms and marketing automation
Key integrations: Mailchimp, ActiveCampaign, HubSpot, SendGrid, Mailgun, API access
Data flows: Test emails sent to GlockApps seed list; deliverability report generated; spam score and client previews provided; blocklist monitor checks daily
Security & Compliance
- SSO / SAML: No
- RBAC / permissions: Yes
- Audit logs: Yes
- Certifications: GDPR compliant
- Data residency: US
Implementation & Ownership
- Time to first value: Immediate — send a test email
- Implementation complexity: Very low — no integration required for basic testing
- Typical owners: Email Deliverability Specialist, Marketing Operations, Email Marketer
Essential tool for email marketers doing pre-send QA; pairs well with email warm-up tools
Proof & Buyer Signals
Ratings: G2: 4.6/5 (100+ reviews)
What buyers praise:
- Comprehensive spam filter testing
- Blocklist monitoring is reliable
- Good for pre-send QA workflow
Common complaints:
- Testing credits model can be expensive for high volume
- Some spam filters not covered
Often Compared With
- Litmus — Litmus is a full email testing and analytics platform; GlockApps focuses specifically on deliverability testing and inbox placement across spam filters
- Mailgun — Mailgun is an email sending infrastructure provider; GlockApps is a testing tool to verify deliverability before using any sending service
- Validity — Validity is an enterprise email deliverability platform; GlockApps is a more accessible tool for teams doing pre-send spam filter testing
