In February 2024, Notion bought Skiff, an encrypted email and productivity software startup. Within a year, Notion shut down Skiff’s email service (taking @skiff.com email addresses with it). And in April 2025, the San Francisco-based company released Notion Mail, a Gmail client primarily built by people who joined Notion through the Skiff acquisition. Today, Notion announced that it’s shutting down Notion Mail, effectively killing what little remained of Skiff email.

In an X post (first spotted by 9to5Mac) today, Notion said that it will shutter the Notion Mail “inbox across web, desktop, and iOS on September 22.”

The post claimed that most Notion users don’t use email clients anyway and instead rely on AI agents to handle their electronic correspondence. It reads:

We launched Notion Mail with a belief that your inbox should think like you—more personal to how you work and over time, more capable with AI.

As Notion agents have gotten more capable, we’ve seen more users hand off email workflows to them. Today, more than half of Notion Mail users manage emails without ever opening their inbox. So, we’re going all in on using agents to run your inbox.

Notion noted that most user data will stay in Gmail. A support page reads: “When the Notion Mail inbox shuts down, your email history will stay exactly where it is in Gmail.”

However, Notion urged users to export drafts and scheduled emails by September 21, since those won’t automatically carry over to an alternative app. Notion noted that users can also save their Notion Mail setups and “export your snippets and auto label instructions to use elsewhere.”

“If you have auto label set up in Notion Mail, you won’t have to rebuild it. Create a Custom Agent in a few clicks, and we’ll bring your existing rules over for you,” the X post explained. “And if you’re already running Notion agents to manage email, they’ll continue running. Your email connection in Notion stays in place.”

Organizations that relied on Notion Mail in a regulated environment might have to transition from Notion Mail earlier.

“If you rely on HIPAA coverage, you should plan to transition off Notion Mail by June 30, 2026,” Notion’s support page reads.

Skiff reportedly served 2 million users, giving rivals like Proton Mail a run for their money before the Notion acquisition. As a Gmail client that didn’t support end-to-end encryption, Notion’s approach to email lacked the privacy focus that Skiff carried as an email provider. Still, Notion Mail was built with Skiff’s infrastructure and by former Skiff executives, making its impending demise feel like a sort of swan song for Skiff.

Although Notion is killing its Skiff-influenced email client, it may continue leveraging the human resources and other productivity ideas (around calendars and storage, for instance) gained through its Skiff acquisition as it tries to compete more strongly against rivals like Google Workspace. Notion, however, has strayed from releasing direct follow-up products to Skiff’s portfolio.