Terms of use
Effective October 1, 2026
Access
Horizon and Mail Sifter are privately hosted applications. You may use an installation only if its operator has given you access. Connect only Google or mail accounts that you own or are authorized to use.
Google account connections
Connecting a Google account is optional. Horizon and Mail Sifter request separate permissions for their features, as described on the home page and in the privacy policy. You can revoke either application’s access in Google Account settings. Features that depend on the connection may stop working after revocation.
Questions and changes
Contact the operator of your private installation for access, support, or requests about locally stored data. The operator may change the applications and these terms; updates to these terms will be published here with a new effective date.