Over 90% of cyberattacks start with email. For a business, a single successful phishing email can lead to financial loss, leaked customer data and operational downtime. Here are the 2026 threats and a layered way to defend against them.
Why is email the #1 target?
Email is the gateway to every system: it holds sensitive information, links to bank accounts, and is a trusted communication channel. An attacker only needs one employee to click a malicious link to get in.
Common email threats in 2026
| Threat | How it works |
|---|---|
| Phishing | Fake emails impersonating banks or partners to steal passwords |
| BEC (executive impersonation) | Fake emails from the "boss"/finance requesting urgent transfers |
| Ransomware | Attachments that encrypt data and demand ransom |
| Account takeover | Unauthorized logins from leaked passwords without MFA |
6 layers of defense for your business
- Email authentication (SPF, DKIM, DMARC): stops attackers from spoofing your domain.
- Multi-factor authentication (MFA): a second lock even if a password leaks — mandatory for every account.
- Anti-phishing & malware filtering: built into premium business email such as Google Workspace and Microsoft 365.
- Staff training: recognizing phishing is the most important "human firewall".
- Regular data backup: to recover quickly from ransomware.
- Permissions & monitoring: least privilege by role, watch for unusual logins.
Security built into the platform
Both Google Workspace and Microsoft 365 include phishing filters, MFA, encryption and enterprise-grade admin controls — letting you implement most of the six layers above within a single platform.
Frequently asked questions
Do small businesses really need to worry about email security?
Yes — small businesses are often easier targets because they have fewer defenses. The cost of an incident (lost money, lost customer data) far exceeds the cost of prevention.
What are SPF, DKIM and DMARC?
These are three authentication records that let receiving mail servers verify an email really comes from your domain, preventing spoofing. Viet Nis configures them when deploying business email.
Protect your business email & data today
Viet Nis deploys business email with SPF/DKIM/DMARC and MFA — 5% below list, VAT invoices.
