Question 1

What is business spam filtering?

Accepted Answer

Business spam filtering is a combination of tools and policies that block unwanted, malicious, and dangerous email before it reaches your employees' inboxes. Modern spam filtering goes far beyond blocking obvious junk — it includes anti-phishing detection, malware attachment scanning, URL reputation checking, and AI-based analysis of email content and sender behaviour. Coreitech manages a multi-layer email filtering stack built on Microsoft Exchange Online Protection (EOP) and Microsoft Defender for Office 365.

Question 2

Is Microsoft 365 spam filtering good enough?

Accepted Answer

Exchange Online Protection (EOP) — included in all Microsoft 365 plans — provides solid baseline spam filtering. However, it lacks the advanced capabilities needed to stop modern targeted threats: no Safe Links (real-time URL scanning on click), no Safe Attachments (sandbox detonation), and limited anti-phishing AI. For businesses targeted by spear phishing, BEC, or ransomware delivery via email, Microsoft Defender for Office 365 Plan 1 (included in Business Premium) is necessary — and it must be properly configured to be effective.

Question 3

What is the difference between spam filtering and email security?

Accepted Answer

Spam filtering is one component of a broader email security strategy. Spam filters block bulk unsolicited email based on content, sender reputation, and blacklists. Advanced email security adds: Safe Links (URL scanning at click time), Safe Attachments (file sandboxing), anti-phishing AI (impersonation detection), DMARC/DKIM/SPF (authentication), and DLP (data loss prevention). Coreitech configures the full stack — not just spam filtering — to protect against the full range of email-borne threats.

Question 4

How do you reduce email false positives?

Accepted Answer

False positives (legitimate emails blocked as spam) are a common problem with overly aggressive filtering. Coreitech tunes spam filter sensitivity to your organisation — whitelisting trusted senders and domains, adjusting SCL (Spam Confidence Level) thresholds, configuring safe sender lists, and reviewing quarantine reports weekly to identify and release legitimate emails. We also set up end-user quarantine digest reports so staff can self-release emails caught in spam without IT involvement.

Question 5

Can you stop malicious attachments from reaching inboxes?

Accepted Answer

Yes. Microsoft Defender for Office 365 Safe Attachments detonates every attachment in an isolated sandbox environment before delivery. If the file exhibits malicious behaviour — even if the file type and content look legitimate — it is blocked and replaced with a notification. This is the primary defence against zero-day malware and ransomware delivered via email attachments. Coreitech configures Safe Attachments with Dynamic Delivery (the email body arrives immediately while the attachment is scanned) to minimise delivery delays.

SPAM
FILTERING
LONDON

Spam filtering London — frequently asked questions

Clean up your inbox and secure your email

SPAMFILTERINGLONDON

Spam filtering London — frequently asked questions

Clean up your inbox and secure your email

SPAM
FILTERING
LONDON