Email and Spam Protection for Sydney Businesses
Business email compromise (BEC) is the most financially damaging cybercrime affecting Australian businesses: AU$79 million lost in 2023 alone according to the ACCC. Most Sydney SMEs have email configured with default settings that offer minimal protection. 4iT hardens email security using Microsoft Defender for Office 365 and properly configured DNS authentication records across all domains we manage.
Sydney MSP
Greater Sydney, NSW
- Microsoft Partner
- Sophos Partner
- Ubiquiti Partner
What Email Security Does 4iT Configure for Sydney Businesses?
Starting with DNS authentication: every domain 4iT manages gets SPF, DKIM, and DMARC records correctly configured and set to reject. These three records prevent criminals from sending email that appears to come from your domain.
On the Microsoft 365 side, we enable Microsoft Defender for Office 365 Plan 1 covering anti-phishing, anti-malware, safe links, and safe attachments. We configure strict anti-spam policies, enable mailbox auditing, and set up alerts for suspicious login activity and mail forwarding rules, a common indicator of a compromised account.
What Is DMARC and Why Does Every Sydney Business Need It?
DMARC (Domain-based Message Authentication, Reporting and Conformance) tells receiving mail servers what to do when someone sends email claiming to be from your domain but failing authentication. A DMARC policy set to reject means spoofed email goes directly to the bin rather than the recipient’s inbox.
Without DMARC, anyone can send an email appearing to come from [email protected] and most mail servers will deliver it. This is exactly how supplier impersonation scams work. The Australian Cyber Security Centre recommends DMARC as a baseline control for all Australian businesses.
How Do We Protect Against Business Email Compromise in Sydney?
BEC attacks typically involve compromising a legitimate email account and using it to redirect payments or impersonate the business owner. Our defence layers: MFA on all mailboxes blocks most account takeover attempts; alerts for suspicious forwarding rules catch attackers who auto-forward mail to monitor conversations; Microsoft Defender anti-phishing stops credential-harvesting pages; and staff training ensures payment instruction changes are always verified by phone.
For high-risk roles such as anyone who authorises payments or transfers, we recommend additional Conditional Access policies requiring a managed and Intune-compliant device.
What Happens When a Sydney Business Gets a Phishing Email?
With Microsoft Defender configured, most phishing emails are quarantined before reaching inboxes. When something gets through, staff use the Report button in Outlook to submit it to Microsoft’s threat intelligence. We review quarantine queues weekly and adjust policies based on what’s getting through.
If a staff member clicks a link and enters their credentials, automated alerts fire within minutes. We revoke the compromised session, reset the password and MFA token, and review the mailbox for forwarding rules or outbound spam activity within the hour.
Frequently Asked Questions
Spam filtering catches bulk commercial email. Email security covers phishing, credential theft, malware in attachments, business email compromise, account takeover, and domain spoofing. Spam filtering is a small subset of a complete email security posture.
Yes. Sophos protects the endpoint, your PC or laptop, after an email arrives. Microsoft Defender for Office 365 protects the email flow before it reaches the device. A malicious link is caught and blocked by Defender before Sophos ever sees it.
DMARC reporting tells you. We configure DMARC with a reporting address that collects reports from receiving mail servers about emails claiming to come from your domain. You can see exactly who is sending email pretending to be you.
DNS changes for SPF, DKIM, and DMARC propagate within 24 to 48 hours. Microsoft Defender configuration takes 2 to 4 hours per tenant. We typically complete an email security hardening engagement within one week of receiving access.
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4iT Support covers SMEs across Greater Sydney including the Hills District, North Shore, Parramatta, and the CBD. No lock-in contracts. Straight answers.