MXToolbox Alternatives: DNS & Email Toolbox

MXToolbox launched in 2006. Core feature: blacklist monitoring (100+ RBLs), MX lookup, SPF/DKIM/DMARC analyzer. Pro plan ($99+/mo) adds: API, 30+ server monitoring, blacklist alerts. Free tier is heavily rate-limited in 2026.

• You need frequent automated DNS checks — MXToolbox caps at 3/day, Enterno gives 30/min free
• You serve Runet — Enterno.io has Moscow vantage points, MXToolbox is sometimes throttled
• You have a ruble budget — Enterno Pro ₽490 vs MXToolbox Pro $129
• If you need deep RBL monitoring — MXToolbox specialises in that

In 2026, top alternatives to MXToolbox for DNS and email tools include DNSstuff, IntoDNS, and GlockApps, offering comprehensive features like DNS diagnostics, email deliverability checks, and server monitoring. Each tool provides unique functionalities tailored for different needs, such as dig commands for DNS lookups and SPF record analysis to improve email security and deliverability.

DNSstuff stands out as a formidable alternative to MXToolbox, particularly for professionals seeking detailed DNS analysis and troubleshooting tools. The platform offers a suite of services including DNS lookup, WHOIS lookup, and email diagnostics.

One of the key features of DNSstuff is its DNS Lookup tool, which allows users to perform various queries, such as:

• nslookup for obtaining domain names and IP addresses.
• dig for querying DNS nameservers directly.

For example, to check the A record of a domain, you can use:

dig example.com A

This command will return the IP address associated with example.com, providing immediate insight into DNS configurations.

DNSstuff also includes features like:

• Email Testing: Check SPF, DKIM, and DMARC records to enhance email deliverability.
• Network Monitoring: Real-time alerts for downtime and performance issues.
• WHOIS Lookup: Access ownership and registration details of domains.

In contrast to MXToolbox, DNSstuff offers more granular control over DNS settings and a user-friendly interface that appeals to both novices and experienced users alike. The pricing structure is competitive, with plans starting at around $10/month, making it accessible for small businesses and individuals.

GlockApps is a powerful alternative specifically designed for email marketers and IT professionals focused on enhancing email deliverability. Unlike MXToolbox, which offers a broader range of DNS tools, GlockApps specializes in optimizing email campaigns and ensuring that messages land in the inbox rather than the spam folder.

One of GlockApps' standout features is its Inbox Placement Test, which allows users to see how their emails perform across various email providers. This tool evaluates whether emails reach the inbox or get filtered to spam, providing actionable insights.

To utilize GlockApps effectively, users can perform the following:

1. Create an email campaign.
2. Send test emails to GlockApps' dedicated test addresses.
3. Analyze the results across major providers like Gmail, Yahoo, and Outlook.

GlockApps also provides:

• Spam Testing: Identify potential spam triggers and improve email content.
• Sender Reputation Monitoring: Track and improve your sender score to boost deliverability.
• Real-time Analytics: Monitor engagement metrics to optimize future campaigns.

For example, by sending a test email with the subject line “Exciting Offer Just for You!”, users can assess how it performs with various filters and adjust content based on the feedback received. GlockApps pricing starts at approximately $29/month, making it a cost-effective tool for businesses serious about email marketing.