MXToolbox
Email and domain diagnosticsLook up MX, DNS and common email-delivery signals when you need more detail.
External tool · independently curated
A practical starting point for UK SME owners: begin with a free check, use independent context where it helps, and ask a better question before you buy anything.
01 · Free Tools
The IT Club checker is the primary starting point because it asks only for a domain and explains public email settings in plain English.
Check MX, SPF, DKIM, DMARC and DNSSEC without passwords, mailbox access or an account. It is a useful point-in-time view, not a certificate or a substitute for your provider's advice.
02 · Recommended Products & Services
These are genuine tools that can help with a specific question. They are not endorsements, rankings or a buying funnel. Check the provider's terms and privacy information before using an external service.
Relationship note
Most links leave IT Club. The Email Security Tool is hosted by Altitude IT Support and is labelled as such.
Look up MX, DNS and common email-delivery signals when you need more detail.
External tool · independently curated
Check an email address against known breaches. Never enter a password here or anywhere else to test it.
External tool · independently curated
Review security recommendations in a Microsoft 365 tenant you administer.
External tool · independently curated
Use it for a second opinion on a link, file, domain or IP address before acting.
External tool · independently curated
Follow reported ransomware activity and use it as context for resilience conversations.
External tool · independently curated
Start with the National Cyber Security Centre's explanation of the Cyber Essentials controls.
External tool · independently curated
Inspect the HTTP security headers returned by a public website.
External tool · independently curated
Test the public TLS configuration of a website and understand the result before changing anything.
External tool · independently curated
A separate Altitude IT Support tool for email-security checks, provided here with the relationship made clear.
Free tool provided by Altitude IT Support
03 · Member Benefits
Member benefits are being worked on and are not available yet. When there is something real to share, it will be described here with the eligibility, limits and relationship made clear.
We recreate the small, privacy-conscious checks that belong on IT Club. For specialist services, we link out instead of pretending to own the experience. We leave out pressure tactics and tools that ask for data they do not need.
No affiliate links are currently used. If that changes, we will disclose the relationship beside the relevant link before it is published. An external tool's presence here is not a guarantee, certification or recommendation to purchase a service.
The right next step
Ask the Advisor. Bring the domain, tool result or plain-language concern. You will get a practical answer, not a provider lead-generation form.
The IT Club Briefing shares concise updates for UK business owners, without the catalogue of noise.