Countdown until the UK analogue phone switch-off on 31 January 2027.Is your business affected?
Free Tool

Check your public email and website security settings

Nine read-only checks against what anyone on the internet can already see about your domain. Results in seconds, no email address needed.

Passive and read-only: public DNS and the response your website gives any visitor. Nothing is probed or logged into, and no email address is needed.

Quick answer

This check reads nine public settings for any business domain: SPF, DKIM and DMARC (who can send email as you), MTA-STS and TLS reporting (whether email to you travels encrypted), and the website's HTTPS redirect, certificate, HSTS and clickjacking protection. It uses public DNS, the response your website gives any visitor and the certificate it presents. It does not port-scan, test or log into anything, so it cannot see internal systems or services - those are covered by the deeper external-exposure review.

What happens next

01

Run the check

Enter your domain. Each of the nine settings is read live and explained in a sentence.

02

Fix the quick wins

Most gaps here are DNS records or web server headers. DMARC set to p=none is the most common and the one behind most invoice fraud.

03

Go deeper if you need to

The deeper external-exposure review adds internet-facing services, forgotten subdomains and certificate problems, walked through on a 20-minute call.

What the check reads

SPF, DKIM and DMARC

Whether someone can send email that appears to come from you, and what receiving servers are told to do with it.

MTA-STS and TLS reporting

Whether email sent to you must travel encrypted, and whether anyone hears about it when it doesn't.

HTTPS, certificate and headers

Whether visitors always land on the encrypted site, the certificate is trusted and in date, and HSTS and framing protections are set.

Gaps you'd rather hand over?

AMVIA fixes what this check finds as routine work - email authentication, web server headers and certificates - and monitors your external exposure continuously.

Attack surface scan questions