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On the recordRead 15 Oct 202649 facts
MxToolbox Inbox Placement
Austin, Texas, United States
Plans and prices
Free
Free
Blacklist monitoring weekly · 1 domain · top 30 blacklists
Read 15 Oct 2026 · mxtoolbox.com
Delivery Center
$129a month
30 inbox-placement analyses/month · 5 domains · 500,000 messages · recipient complaints
Read 15 Oct 2026 · mxtoolbox.com
Delivery Center Plus
$399a month
100 inbox-placement analyses/month · 5 domains · 5,000,000 messages · all Delivery Center features
Read 15 Oct 2026 · mxtoolbox.com
On the record
- API authentication
- API requests use HTTPS, JSON responses and an API key supplied in the Authorization header.api.mxtoolbox.com · read 15 Oct 2026
- API quotas
- Free API accounts receive 64 DNS requests per day and no network requests; paid quotas depend on the plan.api.mxtoolbox.com · read 15 Oct 2026
- API SDK position
- The API quick-start says no SDK is required and can be used with any HTTP client.api.mxtoolbox.com · read 15 Oct 2026
- Authentication analysis
- The feature analyzes SPF authentication and alignment, DKIM alignment, DMARC compliance and BIMI readiness.mxtoolbox.com · read 15 Oct 2026
- Authentication checks
- It analyzes email headers and DNS records for SPF, DKIM, and DMARC configuration and compliance.mxtoolbox.com · read 8 Oct 2026
- Blacklist detection
- Adaptive monitoring checks domain and sending-IP reputation against active blacklist problems.mxtoolbox.com · read 15 Oct 2026
- Bulk-sender compliance
- Tests cover Google, Microsoft and Yahoo bulk-sender requirements such as spam-rate thresholds, DMARC policy and one-click unsubscribe.mxtoolbox.com · read 15 Oct 2026
- Bulk sender rules
- It tests against Google, Microsoft, and Yahoo bulk sender requirements, including spam-rate, DMARC, and one-click unsubscribe criteria.mxtoolbox.com · read 8 Oct 2026
- Company facts
- LinkedIn lists MxToolBox as privately held, founded in 2003, headquartered in Austin, Texas, with 11–50 employees.linkedin.com · read 15 Oct 2026
- Company identity
- The legal company name shown on MxToolbox’s contact page is MxToolbox, Inc.mxtoolbox.com · read 15 Oct 2026
- Content analysis
- Reports check spam-like wording, image counts, links and one-click-unsubscribe compliance.mxtoolbox.com · read 15 Oct 2026
- Continuous monitoring
- Users can add MxToolbox test inboxes to active mailing lists to monitor every campaign automatically.knowledgebase.mxtoolbox.com · read 15 Oct 2026
- Data protection
- The DPA identifies MxToolbox, Inc. at 12710 Research Blvd., Austin, Texas and references GDPR, UK GDPR and Swiss transfer safeguards.mxtoolbox.com · read 15 Oct 2026
- Deployment model
- The product pages describe a hosted web service accessed through Delivery Center and do not describe self-hosting or an open-source licence.mxtoolbox.com · read 15 Oct 2026
- Email rendering
- MxToolbox renders messages across email clients and highlights formatting issues.mxtoolbox.com · read 15 Oct 2026
- Email retention
- Emails sent to Inbox Placement are temporarily stored and deleted after 180 days, and the help page says they are inaccessible on a secure server.knowledgebase.mxtoolbox.com · read 8 Oct 2026
- Integration catalog
- Delivery Center documentation lists integrations for Inbox Placement, BIMI, DMARC, SPF, Yahoo feedback loops, Validity, Mailgun, Google Postmaster, Microsoft SNDS and SendGrid.knowledgebase.mxtoolbox.com · read 15 Oct 2026
- Intended users
- MxToolbox describes Delivery Center as serving email novices, professionals, marketers, and technicians.mxtoolbox.com · read 8 Oct 2026
