MxToolbox alternative for senders checking email authentication and blocklists
For senders checking email authentication and blocklists, Zalwin's EmailAuthPulse, DnsBlacklistPulse, NewsletterDeliverabilityKit cover email deliverability with a free preview without an account, paid plans from $4.99, and API and MCP access. Sources are public; MxToolbox is a separate product we are not affiliated with.
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How does Zalwin compare to MxToolbox for email deliverability?
| What you need | Zalwin | MxToolbox |
|---|---|---|
| Who it is for | senders checking email authentication and blocklists | Check MxToolbox's site |
| Free preview | Yes, no account needed | Check MxToolbox's site |
| Starting price | $4.99 (published on each product page) | Check MxToolbox's site |
| Data sources | Public DNS lookups; Read-Only DNS Zone, MTA-STS, TLS-RPT & RBL Health Checker; Public DNS lookups and public DNS blocklists | Check MxToolbox's site |
| Records available now | Scan-based tool | Check MxToolbox's site |
| API and AI-agent (MCP) access | Yes: REST API and MCP tools | Check MxToolbox's site |
| Update cadence | EmailAuthPulse: runs live per scan; DnsBlacklistPulse: runs live per scan; NewsletterDeliverabilityKit: runs live per scan | Check MxToolbox's site |
Which Zalwin tools fit?
- EmailAuthPulse: SPF, DKIM, DMARC and BIMI check and record generator
- DnsBlacklistPulse: Live domain and mail-server IP spam blocklist (RBL), MTA-STS, TLS-RPT and PTR record scanner
- NewsletterDeliverabilityKit: Checks bulk-sender rules, SPF lookups, ESP includes, DKIM, DMARC, BIMI, MX and blocklists, with an ESP-specific DNS fix pack
Frequently asked questions
Is Zalwin affiliated with MxToolbox?
No. MxToolbox is a trademark of its owner. This page describes Zalwin's tools; for MxToolbox's current features and pricing, see its own site.
What does it cost?
EmailAuthPulse from $4.99; DnsBlacklistPulse from $4.99; NewsletterDeliverabilityKit from $4.99. Every tool has a free preview.
Where does the data come from?
Public DNS lookups; Read-Only DNS Zone, MTA-STS, TLS-RPT & RBL Health Checker; Public DNS lookups and public DNS blocklists. Public sources only; company-level records.
MxToolbox and other product names are trademarks of their respective owners. Zalwin is not affiliated with or endorsed by them. This page describes Zalwin's own tools; features and prices of other products change, so check their sites. Data reports · All comparisons