The threats hidden among ordinary email
Business email compromise, fake invoices, password-harvesting pages, malicious attachments and supplier impersonation may look more convincing than traditional spam.
What a modern filter can assess
Good filtering checks sender reputation, authentication, message patterns, attachment behaviour, links and impersonation signals. Some systems can rewrite or inspect links when they are clicked.
Why Microsoft 365 settings still matter
SPF, DKIM and DMARC help receiving systems validate your domain. MFA, conditional access and mailbox auditing reduce the damage if a password is stolen.
Avoid making staff the only security layer
Training is important, but people should not be expected to defeat every sophisticated message. Technology should remove as much risk as practical before email reaches the inbox.
Create a simple reporting path
Staff should know how to report a suspicious message without forwarding dangerous content widely. Fast review can protect other users who received the same campaign.
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