91% of cyber attacks start with email. Coreitech's email security service deploys Microsoft Defender for Office 365, Safe Links, Safe Attachments, DMARC, anti-impersonation AI, and phishing simulation training — protecting London businesses from phishing, BEC, and ransomware delivery.
EMAIL
SECURITY
LONDON
Anti-Phishing · BEC Protection · Safe Links · DMARC · Phishing Training
Over 91% of cyber attacks start with email. Phishing, ransomware delivery, CEO fraud, and business email compromise are all email-borne. Coreitech deploys a managed email security service that stops threats before they reach your team — including anti-phishing protection and business email compromise protection.
Email threats targeting
London businesses in 2026
Phishing & Spear Phishing
Targeted emails impersonating HMRC, suppliers, banks, or senior colleagues — designed to steal credentials, trigger payments, or deliver malware. AI-generated spear-phishing in 2026 is near-indistinguishable from genuine email.
Business Email Compromise (BEC)
Attackers spoof or hijack a real email account to request fraudulent payments or data transfers. Average BEC loss for UK SMEs: £27,000 per incident. Conviction rate for BEC fraud is under 5%.
Malware & Ransomware Delivery
Over 90% of ransomware is delivered via email — malicious attachments or links. Advanced email security sandboxes attachments and scans links in real time before delivery to inboxes.
CEO / CFO Fraud
Impersonation of executives to pressure finance staff into urgent wire transfers. Increasingly AI-generated using scraped LinkedIn and company website data. Requires advanced impersonation detection.
Credential Harvesting
Fake Microsoft 365, OneDrive, or banking login pages capturing credentials. Often delivered via convincing phishing emails. Safe Links scanning blocks these in real time.
Supply Chain Email Attacks
Attackers compromise a trusted supplier's email account and use it to send malicious content that bypasses standard spam filters — appearing to come from a trusted sender.
Managed email security service
for London businesses
Microsoft Defender for Office 365
Plan 1 and Plan 2 — ATP, Safe Links, Safe Attachments, and anti-phishing policies properly configured and actively managed. Not just deployed — tuned to your environment.
Safe Links & Safe Attachments
Every URL in every email and document scanned in real time. Every attachment detonated in a sandboxed environment before delivery. Zero-day protection against novel threats.
Anti-Phishing & Impersonation Protection
AI-based detection of executive impersonation, domain spoofing, and brand impersonation. Protects against targeted attacks that basic spam filters miss completely.
DMARC, DKIM & SPF Configuration
Email authentication protocols preventing your domain from being spoofed. Without DMARC configured correctly, anyone can send emails appearing to come from your domain. We configure and monitor all three.
Phishing Simulation Training
Regular simulated phishing campaigns to your staff — they look real but are harmless. Immediate in-context training when someone clicks. Reduces click rates by 60–80% over 12 months.
Email Encryption & DLP
Microsoft Purview Message Encryption for sensitive communications. Data Loss Prevention policies preventing confidential data leaving your organisation via email.
Business email compromise
protection for UK businesses
Business email compromise (BEC) is one of the most financially damaging cyber crimes facing UK SMEs. Attackers either gain access to a legitimate email account (through phishing or credential theft) or spoof a trusted domain — then use it to request fraudulent payments, divert invoices, or steal sensitive data.
For law firms and property transactions: BEC is the primary mechanism behind conveyancing fraud — where attackers intercept email communications and substitute fraudulent bank account details. Average losses run to £50,000–£500,000 per incident.
For financial services and accountancy: CEO fraud and payment diversion attacks target finance staff with urgent wire transfer requests appearing to come from directors or senior partners.
Coreitech's BEC protection combines: MFA enforcement (prevents account takeover), DMARC/DKIM/SPF (prevents domain spoofing), Microsoft Defender anti-impersonation AI (detects lookalike domains and executive name spoofing), and staff training on verification procedures (phone confirmation for any new payment instructions).
Why Microsoft 365 default security isn't enough
Email security & anti-phishing
questions answered
Q.What is email security for businesses?
Business email security is a set of tools and configurations that protect your organisation from email-borne threats — phishing, malware delivery, business email compromise, and spam. It goes beyond basic spam filtering to include real-time URL scanning (Safe Links), attachment sandboxing (Safe Attachments), impersonation detection, email authentication (DMARC/DKIM/SPF), and staff phishing simulation training.
Q.What is business email compromise (BEC) and how do you protect against it?
Business email compromise (BEC) occurs when an attacker either hacks a legitimate email account or spoofs one to trick staff into transferring money or data. BEC costs UK businesses an average of £27,000 per incident. Protection requires: MFA on all email accounts (prevents account takeover), DMARC/DKIM/SPF (prevents spoofing), Microsoft Defender for Office 365 with anti-impersonation policies (detects lookalike domains and executive impersonation), and staff training on verification procedures.
Q.What is anti-phishing protection for small businesses?
Anti-phishing protection for small businesses consists of: (1) email filtering that blocks known phishing emails before delivery; (2) Safe Links — real-time URL scanning that re-checks every link when clicked, even if the URL was clean at delivery time; (3) anti-impersonation AI that detects when an email is impersonating your CEO or a trusted supplier; (4) phishing simulation training so staff can recognise attacks that do get through. Microsoft 365 Business Premium includes the core technical controls — Coreitech configures and manages them correctly.
Q.Is Microsoft 365 email security enough on its own?
Basic Exchange Online Protection (included in all M365 plans) is insufficient against modern threats. For adequate protection, you need Microsoft Defender for Office 365 Plan 1 (included in Business Premium) — and critically, it must be properly configured. Most UK SMEs have M365 deployed but with default, unconfigured security settings that leave significant gaps. Coreitech actively manages your M365 security configuration and reviews it monthly.
Q.What is DMARC and do I need it?
DMARC (Domain-based Message Authentication, Reporting & Conformance) is an email authentication protocol that prevents attackers spoofing your domain to send phishing emails to your clients and contacts. Without DMARC, anyone can send emails that appear to come from your domain — a common technique in conveyancing fraud and BEC. NCSC strongly recommends DMARC for all organisations. Google and Yahoo now require it for bulk senders. Coreitech configures DMARC, DKIM, and SPF as part of email security deployment.
Q.What is phishing simulation training?
Phishing simulation training involves sending your staff controlled fake phishing emails — they look genuine but are completely harmless. When someone clicks, they receive immediate in-context training. You receive reporting on click rates, repeat offenders, and improvement over time. Research shows well-run phishing simulation programmes reduce click rates by 60–80% over 12 months. This is the most cost-effective security training investment for most UK SMEs.
Q.How quickly can email security be deployed?
Basic Microsoft Defender for Office 365 configuration and email filtering can be completed within 1–2 days. DMARC/DKIM/SPF setup takes 1–3 days including DNS propagation time. Full phishing simulation programme setup takes approximately one week. We ensure no legitimate email is disrupted during deployment by careful policy sequencing.
Secure your business
against email threats
Free email security review — we'll audit your current Microsoft 365 security configuration, DMARC/DKIM/SPF status, and provide a complete hardening plan. No obligation.