Your Inbox Is Under Attack: What Every Business Needs to Know About Email Security Right Now

Got the Monday blues? We can change that. Grab your coffee, settle in, and let’s talk about something that affects every single business that has an email address, which at this point is… everyone. Email security is not a topic reserved for the IT department or the Fortune 500. It is a front-line issue for businesses of all sizes, and the numbers in 2026 are impossible to ignore.

The Numbers Are Staggering

Right now, roughly 3.4 billion malicious emails are sent every single day. Let that sink in for a moment. That is not a typo. Nearly one million phishing attacks were recorded in just the first quarter of 2025, and that number climbed another 13 percent by Q2. We are heading into 2026 with phishing activity at some of the highest levels ever recorded.

Business Email Compromise, commonly called BEC, is now responsible for 70 percent of all cybersecurity incidents across industries. The average cost of a single BEC attack? $4.67 million. For small and mid-sized businesses, the average recovery cost from any cyberattack sits around $120,000. That is not a bill most small businesses can absorb without serious consequences.

So What Exactly Is Business Email Compromise?

If you have not heard this term before, BEC is a type of scam where a cybercriminal either hacks into a legitimate business email account or impersonates one convincingly enough to trick employees, vendors, or clients into sending money, sharing sensitive data, or taking an action they should not.

These are not the obvious scams of the early 2000s with broken English and outlandish stories. Today’s attackers research your company on LinkedIn. They study how your executives write emails. They mimic your vendors’ communication style down to the email signature. And they time their attacks perfectly, right before payroll, right before a big wire transfer, or right during a busy quarter-end when people are moving fast and may not stop to verify.

Microsoft 365 Is Powerful, But It Is Not Bulletproof Out of the Box

Millions of businesses run on Microsoft 365, and for good reason. It is a robust, feature-rich platform that handles email, file storage, video calls, and collaboration all in one place. But here is a misconception that gets businesses into real trouble: assuming that because your data is in Microsoft’s cloud, it is fully protected by default.

Microsoft operates on what is called a shared responsibility model. They keep the infrastructure running and secure. But configuring your security settings, backing up your data properly, and monitoring for threats inside your environment? That part is on you.

Here are a few gaps that catch businesses off guard:

· Email authentication gaps: SPF, DKIM, and DMARC are protocols that prove your outgoing emails are legitimate and help block spoofed messages impersonating your domain. Many businesses have never configured these, leaving the door wide open for attackers to send emails that look like they came from you.

· Deleted data gone forever: Microsoft only retains deleted emails and files for 14 to 30 days by default. After that, the data is gone. If you do not have a third-party backup solution in place, a mistaken deletion or ransomware attack could mean permanent loss.

· Ransomware sync attacks: If ransomware infects a local device, it can sync those encrypted files directly to OneDrive or SharePoint, locking your entire team out of shared resources almost instantly.

· No unified audit logging: Many older Microsoft 365 tenants do not have the Unified Audit Log enabled by default. Without it, you have no visibility into who accessed what, when, and from where. That visibility is critical during an incident investigation.

 

What Good Email Security Actually Looks Like

A solid email security posture is not one single tool or one single setting. It is a layered approach where multiple protections work together so that if one layer is bypassed, another catches it. Here is what that looks like in practice:

· Multi-Factor Authentication (MFA): This is non-negotiable in 2026. Even if a password is stolen, MFA stops an attacker from using it to access your email account. Every user, every account, no exceptions.

· Email Authentication Protocols: Configure SPF, DKIM, and DMARC on your domain. These work together to verify that emails sent from your domain are legitimate and to instruct receiving servers to reject or quarantine anything that fails the check.

· Advanced Threat Protection: Standard spam filters catch known threats. Advanced threat protection, like what is available in Microsoft Defender for Office 365, goes further by scanning attachments in a sandbox environment, checking links in real time even after delivery, and detecting behavioral patterns associated with phishing and BEC.

· Third-Party Email Security Layers: Tools like Mimecast add an additional layer of filtering, threat intelligence, and continuity features on top of what Microsoft provides natively. These tools often catch things that default settings miss.

· Independent Backups for Microsoft 365: Your Microsoft 365 data should be backed up by a third-party solution that stores copies outside of the Microsoft environment entirely. This protects against accidental deletion, ransomware sync events, and departing employee data loss.

· User Awareness Training: Technology alone is never enough. Regular, practical training so your team knows how to spot a suspicious email, what a spoofed domain looks like, and exactly what to do (or not do) when something feels off is one of the highest-ROI investments a business can make.

Red Flags Your Team Should Know

No security tool replaces an informed team. Make sure your employees know to pause and verify any email that:

· Creates a sense of urgency or pressure (“Do this before end of day or the account will be closed”)

· Requests a wire transfer, gift card purchase, or change to banking/payment details

· Asks for sensitive documents like W-2s, payroll files, or login credentials

· Comes from an executive they rarely hear from, especially if it asks them to bypass normal approval steps

· Has a domain that is slightly off, such as “rj2t-support.com” instead of “rj2t.com”

· Arrives with unexpected attachments or links, especially compressed files or unusual file types

 

When in doubt, pick up the phone. Call the sender directly using a number you already know, not a number listed in the suspicious email itself. One phone call can prevent a $100,000 mistake.

Want to dig deeper into the current email threat landscape?

Read more here: https://www.vikingcloud.com/blog/cybersecurity-statistics

 

This Is Where RJ2T Comes In…

Everything we just walked through, the layered security approach, the Microsoft 365 configuration gaps, the backup strategy, the user training, the advanced threat protection, that is exactly what RJ2 Technologies helps businesses like yours get right. We work with best-in-class partners, including Mimecast for email security, to make sure your inbox is not the weakest link in your business. We assess your current Microsoft 365 environment, identify the gaps that leave you exposed, and build a practical, cost-effective security stack that fits your team and your operations.

You do not need to be a cybersecurity expert to protect your business. You just need the right partner in your corner. Whether you are starting from scratch or looking to tighten up what you already have, our team is ready to help.

Book your free discovery call here: https://meetings.hubspot.com/jeff-dann/free-discovery-call