Independent Email Security Specialists
Email security advice that serves your objectives
Independent, former-Mimecast specialists helping you implement, optimise, migrate, and decommission email security so your users stay protected and your service dependable.
Strategic Context
Email security should protect the business, reduce risk, and keep teams productive
Email is still the front door to most organisations, and it's also one of the easiest places for day-to-day friction to build up. Over time, a secure email setup will become complicated: policies sprawl, exceptions pile up, domains change, and routing decisions get revisited. The result isn't always a big "security event", it's more often the operational pain: missed phishing, inconsistent policy enforcement, mail flow issues, or legitimate messages getting blocked when you need them most.
The goal is a setup you can trust and operate confidently: consistent controls, clear visibility, and changes that don't introduce surprises. That's why teams revisit their email security approach when they're implementing or optimising Mimecast, preparing for a Microsoft 365 change, improving DMARC and MTA-STS, or planning a migration or decommissioning.
Done well, secure email reduces risk while keeping users productive and gives IT and security a platform that's easier to operate and improve.
Common Scenarios
What can we help you improve, fix, or change?
Choose a scenario to find the right service, guidance, and next steps.
Choose the outcome you need from secure email
Whether you're implementing Mimecast, tightening day-to-day controls, or planning a change, we help you reduce risk and operational drag—without slowing the business down.
Faster time-to-value from secure email implementations
Get a best-practice Mimecast setup aligned to your routing, identity and policy needs—so you see results sooner and avoid costly rework.
- •Deployment plan + routing model (inbound/outbound)
- •Authentication + admin roles + operational handover
- •Policy design, testing, and go-live support
Reduce email risk while keeping users productive
When spam, phishing, or malware is slipping through—or legitimate mail is being blocked—we help you tune policies and controls for consistent, explainable outcomes.
- •Configuration review + baselining against best practice
- •Policy clean-up to reduce exceptions and false positives
- •Visibility improvements and safe change control
Move and retain email data with confidence
Maintain compliance and defensibility during migrations and exports with clear chain-of-custody and audit-ready reporting.
- •Mimecast archive exports to PST/EML with integrity reporting
- •Tenant-to-tenant / domain change migration planning
- •Scope, timelines, and verification of completeness
Make platform change predictable, not disruptive
Decommission or transition from Mimecast to Microsoft 365 (or another provider) with controlled cutover planning and reduced operational risk.
- •Cutover planning (routing, domains, coexistence)
- •Risk-managed sequencing and rollback options
- •Post-change validation and tidy-up
Self-Service Tools
Ready-to-Use Tools & Guidance
Looking to self-assess your current setup? Our tools help you evaluate your domain's MTA-STS configuration — with actionable insights in plain English.
Independent • Former-Mimecast email security specialists • Implementation, optimisation, migrations, decommissioning
Customer Testimonial
"We knew something wasn't quite right — and Cydaura quickly pinpointed the issue, helped us fix it, and gave us the confidence that we were back on solid ground."
— Head of IT Operations, mid-sized UK Financial Services firm
Let's Talk About What's Right for You
Every organisation is different. That's why we start with a conversation — not a pitch.