How to Stop Spam and Phishing in Business Email
Spam wastes time; phishing costs money. For a business, a single convincing phishing email can lead to a wire fraud, a leaked password or ransomware. The good news is that most attacks are stoppable with a few layers of defence. Here is how to lock down your business email.
1. Use a host with real filtering
Free or hosting-bundled email often has weak filtering. A dedicated business email provider runs multi-layer filtering - reputation analysis, heuristics and machine learning - that blocks the vast majority of spam, phishing and spoofing before it reaches the inbox. This is the single biggest lever.
2. Authenticate your domain
Set up SPF, DKIM and DMARC so attackers cannot send mail that appears to come from your domain. This protects both your inbox and your customers. We explain the setup in SPF, DKIM and DMARC explained.
3. Turn on two-factor authentication
Most account takeovers start with a stolen password. 2FA stops them cold by requiring a second factor. Enforce it across every mailbox in your organisation - not just admins.
4. Add anti-virus scanning
Malicious attachments are a common delivery method. Ensure inbound and outbound attachments are scanned in real time so infected files never reach a colleague or a client.
5. Watch for unusual logins
Geo login protection and account monitoring flag sign-ins from unexpected locations or devices, so a compromised password is caught before damage is done.
6. Train your team (the human layer)
Technology stops most attacks; people catch the rest. Teach your team to:
- Hover over links before clicking, and check the real domain
- Be suspicious of urgency ("pay this invoice now")
- Verify any change of bank details by phone, never by email alone
- Report suspicious messages rather than delete them silently
7. Keep recoverable backups
If something does slip through, daily backups with point-in-time recovery let you restore a mailbox quickly - a vital safety net against ransomware and accidental deletion.
Layered defence wins
No single control is enough on its own. Strong filtering, domain authentication, 2FA, scanning, monitoring, trained staff and backups together make your business email a hard target.
Want all of this on by default? DigiCloudMail builds these layers into every mailbox. Get in touch to secure your email.
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