About TCP123 UK & Email Score
Email Score is a free email security scanner built and run by TCP123 UK, a UK IT support business serving small and medium-sized companies. Enter a domain and the tool audits its SPF, DKIM and DMARC records, scores the result 0–100, and explains the fixes in plain English.
How it is funded
The scanner is free and always will be. TCP123 UK earns revenue from paid email and DNS remediation work: if your report shows gaps you would rather have handled for you, the fix plan links to our paid service. There is no obligation, and the scan itself never touches your systems.
What the scanner does — and does not do
Every scan reads public DNS records only. We never ask for passwords, never access mailboxes, and never change anything on your domain. Scan queries are not logged against your identity, and anonymous analytics run only with your consent. Full details are in our privacy policy.
The checks follow the email-security standards recommended by the UK's National Cyber Security Centre (SPF, DKIM, DMARC and TLS). Email Score is not certified or endorsed by the NCSC — we simply implement the same published guidance.
Don't just take our word for it
Because every check reads publicly observable DNS records, any result can be verified independently — by you, your IT provider, or any DNS lookup tool. If we report a missing or broken record, you can confirm it yourself in seconds.
This report is a point-in-time snapshot of the records observed when the scan ran. It is not a security certification and not a guarantee of inbox placement or deliverability.
Business details
| Trading name | TCP123 UK |
|---|---|
| About the business | A one-person UK IT support business, trading since 2010, serving small and medium-sized companies around Ascot, Bracknell, Windsor, Maidenhead and Slough. |
| Business address | 142 Liddell Way, South Ascot, Berkshire, SL5 9UZ |
| Telephone | 01344 935008 |
| Contact | support-team@tcp123.uk |
| Website | tcp123.com · emailscore.uk · tcp123.uk |
| Email Score UK on LinkedIn — Free email security checks for UK businesses — SPF, DKIM, DMARC, scored 0–100. | |
| Email Score UK on Facebook — Free email security check for UK businesses. Score your domain in 30 seconds. |
TCP123 UK is a trading name. If a company registration number is added later, it will be published here (tracked as task #6 in docs/TASKS.md).