Notion is shutting down Notion Mail on September 22, saying more than half of its users already manage email through AI agents without opening the inbox — a move that also closes the chapter on the Skiff email infrastructure Notion acquired in 2024.
Notion is discontinuing its email product, Notion Mail, effective September 22, citing a shift in user behavior driven by AI agents — a move that also marks the effective end of the Skiff email infrastructure the company absorbed through a 2024 acquisition.
The San Francisco-based productivity company announced the shutdown in a post on X, saying more than half of Notion Mail users now manage their email without ever opening the inbox, instead delegating that work to Notion's AI agents.
"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," the company said.
Notion Mail functioned as a Gmail client, meaning the underlying email data will remain in Gmail once the product closes. However, Notion has urged users to export drafts and scheduled emails before September 21, as those items will not carry over automatically to any alternative application.
Users who configured auto-label rules inside Notion Mail can preserve that logic by converting it to a custom agent. "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 company's X post explained. Notion also confirmed that any agents already running to manage email will continue operating after the shutdown.
Organizations operating under HIPAA requirements face a tighter deadline. According to a Notion support page, those users "should plan to transition off Notion Mail by June 30, 2026."
The closure effectively concludes the product lineage that began when Notion acquired Skiff — an encrypted email and productivity startup — in February 2024. Skiff had reportedly served 2 million users before the acquisition, competing against privacy-focused services such as Proton Mail. Notion shut down Skiff's own email service within a year of the deal, retiring @skiff.com addresses alongside it, then released Notion Mail in April 2025 as its replacement — a Gmail client built largely by engineers and executives who joined Notion through the Skiff deal.
Notion Mail launched in preview mode in 2024 with features including auto-labeling, filtering, and scheduling assistance, positioning itself against competitors such as Superhuman and Fyxer.
Unlike Skiff, which emphasized end-to-end encryption, Notion Mail did not carry that privacy architecture, reflecting a deliberate pivot toward AI-assisted workflows over security-centric design.
The decision signals a broader strategic reorientation at Notion, one that prioritizes agent-driven automation over traditional user interfaces. Startups such as AgentMail have emerged with similar theses, building email services designed from the ground up to be operated by agents rather than humans. Notion's move to sunset its own inbox product in favor of agent infrastructure aligns with that direction, even as the company reportedly plans to continue drawing on the talent and ideas it gained through Skiff in areas such as calendar and storage products.
How users and enterprise customers respond to the loss of a dedicated inbox — and whether Notion's agent layer proves capable of handling the full complexity of professional email — will be a test of whether the agent-first model is ready to fully replace conventional mail clients.
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