Protect the domain
Learn how authentication policies reduce unauthorised use of your domain and produce useful reporting signals.
Read the DMARC guideIndependent email guidance
Find the right direction for safer, more reliable email.
SenderCompass explains DMARC, SPF, DKIM and email deliverability without unnecessary jargon, helping UK organisations understand risks, compare approaches and make better-informed decisions.
The essentials
Business email has three connected jobs
Authentication helps receivers evaluate authorised sending infrastructure and valid domain signatures. Deliverability influences where legitimate messages land. Monitoring helps you notice when something changes.
Reach the inbox
Understand why valid email can still reach spam, including reputation, complaints, list quality and sending patterns.
Explore deliverabilityChoose with care
Compare monitoring and diagnostic tools using a practical framework rather than relying on feature counts alone.
See the buying frameworkWhy it matters
A technical subject with practical consequences
Invoices, password resets, enquiries and customer updates are only useful when they arrive. Authentication mistakes can also make domain impersonation easier or block legitimate services.
SenderCompass is being developed as a focused UK resource for owners, marketers and technical teams who need clear explanations before making changes.
No rankings or paid placements at launch
This initial edition contains educational guidance only. It has no affiliate links, paid rankings or sponsored recommendations. Any future commercial relationship will be disclosed clearly.
Learning path
Build understanding in the right order
1. Learn the records
See how SPF and DKIM provide authentication signals and why DMARC depends on alignment.
SPF and DKIM guide2. Review exposure
Map every legitimate sender before changing enforcement so important services are not overlooked.
Small-business checklist3. Monitor outcomes
Track reports, reputation and blocklist signals while treating each source in the correct context.
Blacklist monitoring guideStart here
Make your first review structured and reversible.
Inventory senders, verify DNS ownership and record the current configuration before changing policies.