Email Security Services: Types, Costs & How to Choose (2026)
Email scams cost US victims more than $3 billion in 2025, says the FBI. Criminals pretend to be bosses or suppliers to steal money and passwords. Basic spam filters in Microsoft 365 and Google Workspace stop many attacks, but not all. Email security services fill that gap. They check, block, and clean up dangerous email. This guide explains how these services work, what they cost, and which US rules apply. Every number comes from a named source, like the FBI or federal law. It also shows how to compare email security service providers. What Are Email Security Services and How Do They Work? Email security services sit between the internet and your inbox. They check every email coming in and going out. They look at the sender, the links, the attachments, and the words. A spam filter is only one small part of this. These tools connect to your email in one of two ways. Some change your mail route, so all email passes through them first. Others connect straight to Microsoft 365 or G...