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Email DLP, Data Exfiltration

How Tessian Stops Your Data Leaving When Staff Do

by Andrew Webb Wednesday, January 11th, 2023

 As our recent research revealed, 71% of security leaders told us that resignations increase security risks for their organization, and 45% said incidents of data exfiltration increased in 2022, as people took data when they left their jobs. As we head into 2023, the current economic climate coupled with restructuring in most sectors can only add to these concerns.

There’s also the security strain felt by everyone who remains the organization as they try to backfill roles and do their jobs under what might be sometimes difficult circumstances. Other challenges include users being more remote, security teams having too many incidents to investigate, and in the colder months – plain old flu.


Tessian can help remedy insider risks such as these, both malicious exfiltration and accidental data loss, in several ways. Let’s deal with the malicious ones first. As an integrated cloud email security solution, Tessian comes with a variety of policies straight out of the box. Or you can design your own custom policies based on specific actions, teams or data points. 

For example, you might want a policy to flag for severe data exfiltration from staff who you know are leaving. Not only that, you can decide what action to take and simply track exfiltration attempts, warn the user or require justification from their manager before releasing the email. Different teams might have different levels of controls; teams that handle highly sensitive information like sales data or company code or IP, might have more sensitive controls than say marketing. 

How to stop accidental data loss


Then of course there’s accidental data loss. Despite training, turning off auto-complete, and Accidental data loss remains a problem for organizations. According to our  Psychology of Human Error report  two in five respondents (40%) have sent work emails to the wrong person.

This isn’t just embarrassing, it can result in a loss of business. The same report found that nearly a third (29%) of businesses have lost a client or customer as a result of email recipient errors. Tessian can stop these misdirected emails too, providing in the moment alerts to warn users that something’s not quite right.

At Tessian, we’ve built a comprehensive and intelligent cloud email security platform that deploys in seconds via a single API. Using deep content inspection and your historical email data.

Tessian forms a behavioral intelligence model that understands how your people use email. We know who they contact, what they send and receive, and what projects they’re working on.

Simply put, we know when an incident occurs because we understand how your people usually behave.

Andrew Webb Senior Content Manager