Legal
Cookie Policy
Effective January 1, 2026 - Last updated April 1, 2026
This page lists every cookie we set and why it exists.
Cookies we set
A complete list of service-side browser storage items.
| Name | Purpose | Type | Duration | 3rd Party |
|---|---|---|---|---|
| umail_session | Keeps you signed in between page loads | Essential | 7 days or browser close | No |
| umail_csrf | Prevents cross-site request forgery attacks | Essential | Session | No |
| umail_theme | Remembers your light / dark mode preference | Preference | 1 year | No |
| __stripe_mid / __stripe_sid | Stripe payment fraud prevention on billing pages only | Essential (billing) | Up to 1 year | Yes |
What are cookies?
Cookies are small text files placed on your device by a website so the site can recognize your browser across requests and store lightweight items such as a session ID or preference.
U-Mail also uses localStorage and sessionStorage to persist inbox state and draft content between browser sessions. These are not cookies and are not sent to our servers.
What we use and why
We only use the cookies listed in the table above. Essential cookies cannot be disabled without breaking the service.
Non-essential cookies can be cleared or blocked through your browser at any time.
Third-party cookies
Stripe sets fraud-prevention cookies on billing pages only. They are used for payment security, not for advertising, profiling, or retargeting.
How to control cookies
All major browsers let you view, block, and delete cookies. Blocking essential cookies will prevent you from signing in to U-Mail.
Chrome: Settings -> Privacy and security -> Cookies and other site data. Firefox: Settings -> Privacy & Security -> Cookies and Site Data. Safari: Settings -> Privacy -> Manage Website Data. Edge: Settings -> Cookies and site permissions -> Cookies and site data.
Policy changes
If we add new cookies or change how existing ones behave, we update this page and notify registered users at least 14 days before the change takes effect.
Questions?
Need a storage or cookie answer?
We respond to cookie and privacy questions within 5 business days.