MxToolbox Inbox Placement
MxToolbox Inbox Placement tests where messages arrive at major providers: the inbox, Spam or Junk, or undelivered.
What MxToolbox Inbox Placement is
MxToolbox Inbox Placement tests where messages arrive at major providers: the inbox, Spam or Junk, or undelivered. It is a feature within MxToolbox Delivery Center, so access requires a Delivery Center plan. The service works with any email sending system, including named examples HubSpot, Mailchimp, Marketo, and Salesforce. Users can run pre-send tests through a proprietary seed list or add test inboxes to active mailing lists for continuous monitoring. Analysis checks spam-like patterns, image counts, link issues, one-click unsubscribe compliance, and rendering across email clients. It examines headers and DNS records for SPF, DKIM, and DMARC configuration, tests Google, Microsoft, and Yahoo bulk-sender requirements, and checks blacklist issues tied to sending domains and IP addresses. Supported test providers include Google Gmail, Microsoft Outlook 365, and Yahoo Mail. Delivery Center costs $129 a month, while Delivery Center Plus costs $399 a month. Emails sent to Inbox Placement are temporarily stored and deleted after 180 days. Paid plans include onboarding support and an account walkthrough.
Good
- Tests inbox, spam, and undelivered outcomes
- Works with any email sending system
- Supports pre-send and continuous monitoring
- Checks SPF, DKIM, and DMARC
- Includes provider and blacklist checks
Watch out
- No free plan
- No free trial
- Requires a Delivery Center plan
Who it suits
It suits email novices, professionals, marketers, and technicians monitoring deliverability. It is useful for senders needing placement, authentication, reputation, and blocklist checks.
Verdict
Inbox Placement combines placement tests with content, authentication, sender-reputation, and bulk-sender checks. Because it is bundled through Delivery Center, buyers should match the plan limits to their testing volume.
Plans and prices
From MxToolbox Inbox Placement's own pricing page, checked 15 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | Blacklist monitoring weekly · 1 domain · top 30 blacklists · $0/month |
| Delivery Center | $129 a month | 30 inbox-placement analyses/month · 5 domains · 500,000 messages · recipient complaints · DMARC/SPF/DKIM analysis · blacklist monitoring · mailflow monitoring · BIMI · impersonation protection · $129/month |
| Delivery Center Plus | $399 a month | 100 inbox-placement analyses/month · 5 domains · 5,000,000 messages · all Delivery Center features · advanced delivery-threat tools · SPF flattening · $399/month |
The facts
Each one read from MxToolbox Inbox Placement's own pages, with the date it was checked.
What it does
- API authentication
- API requests use HTTPS, JSON responses and an API key supplied in the Authorization header.checked 15 Oct 2026
- API quotas
- Free API accounts receive 64 DNS requests per day and no network requests; paid quotas depend on the plan.checked 15 Oct 2026
- API SDK position
- The API quick-start says no SDK is required and can be used with any HTTP client.checked 15 Oct 2026
- Authentication analysis
- The feature analyzes SPF authentication and alignment, DKIM alignment, DMARC compliance and BIMI readiness.checked 15 Oct 2026
- Authentication checks
- It analyzes email headers and DNS records for SPF, DKIM, and DMARC configuration and compliance.checked 8 Oct 2026
- Blacklist detection
- Adaptive monitoring checks domain and sending-IP reputation against active blacklist problems.checked 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.checked 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.checked 8 Oct 2026
- Content analysis
- Reports check spam-like wording, image counts, links and one-click-unsubscribe compliance.checked 15 Oct 2026
- Continuous monitoring
- Users can add MxToolbox test inboxes to active mailing lists to monitor every campaign automatically.checked 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.checked 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.checked 15 Oct 2026
- Email rendering
- MxToolbox renders messages across email clients and highlights formatting issues.checked 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.checked 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.checked 15 Oct 2026
- Intended users
- MxToolbox describes Delivery Center as serving email novices, professionals, marketers, and technicians.checked 8 Oct 2026
- Limit: Capterra pricing and service
- Capterra reviews include complaints that enterprise use can be expensive and that cancellation or refund support after a trial can be poor.checked 15 Oct 2026
- Limit: G2 interface
- G2’s review summary identifies the user interface as an area some reviewers want improved.checked 15 Oct 2026
- Limit: TrustRadius interface and gaps
- TrustRadius reviews request a clearer or newer interface, more beginner guidance, richer test results and features such as temporary test inboxes or dark mode.checked 15 Oct 2026
- Message retention
- Inbox Placement emails are stored on a secure server and deleted after 180 days.checked 15 Oct 2026
The company
- Company facts
- LinkedIn lists MxToolBox as privately held, founded in 2003, headquartered in Austin, Texas, with 11–50 employees.checked 15 Oct 2026
- Company identity
- The legal company name shown on MxToolbox’s contact page is MxToolbox, Inc.checked 15 Oct 2026
- Headquarters
- Austin, Texas, United Stateschecked 28 Sep 2026
Money
- Limit: Trustpilot billing complaints
- Several Trustpilot reviewers allege unexpected charges, difficulty cancelling, delayed refunds or unresponsive customer service.checked 15 Oct 2026
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