What is Email Filtering?
Email filtering (or secure email gateway) inspects inbound and outbound email for spam, phishing, malicious links and dangerous attachments before they reach user inboxes. Modern filters use AI, link rewriting and attachment sandboxing on top of authentication checks like SPF, DKIM and DMARC.
Why Email Filtering matters for Australian businesses
With cyberattacks on Australian businesses increasing year on year, understanding your security tools and strategies is critical. The Australian Cyber Security Centre reports an attack every six minutes, and small and medium businesses are increasingly targeted. Having the right defences in place is not optional — it is essential for protecting your data, your clients, and your reputation.
For small and medium businesses in particular, email filtering can make a real difference in maintaining a secure, efficient, and resilient IT environment. Whether you are reviewing your current setup or planning improvements, understanding the role of email filtering in your broader IT strategy will help you have more informed conversations with your IT provider and make better decisions for your business.
Related terms
Phishing • BEC • Sandboxing
How All IT Services can help
At All IT Services, we help businesses across Sydney, Brisbane, Melbourne, and regional NSW implement and manage email filtering as part of our comprehensive cybersecurity solutions. If you have questions about how this fits into your IT strategy, contact our team for a no-obligation consultation.
Frequently Asked Questions
What does email filtering do?
It scans email for spam, malware, phishing links and impersonation attempts, quarantining threats before delivery and often rewriting links so they are checked again at click time.
Is Microsoft 365 built-in filtering enough?
Microsoft’s baseline protection is solid, but many businesses layer advanced phishing protection, impersonation detection and sandboxing on top for stronger coverage against targeted attacks.
What are SPF, DKIM and DMARC?
They are DNS-based email authentication standards proving mail genuinely comes from your domain, making it much harder for criminals to spoof your business in phishing campaigns.