Application access given mails

You're looking for a way to grant access to an application using email addresses. Here are a few options:

1. Email-based authentication: Some applications allow users to sign up or log in using their email address and password. This is a simple way to grant access to an application using an email address.
2. Email-based authorization: In this approach, an email address is used as a unique identifier to authenticate and authorize access to an application. This can be achieved using email-based authentication protocols like OAuth or OpenID Connect.
3. Single Sign-On (SSO) with email: Some SSO solutions allow users to log in to an application using their email address and password. This eliminates the need for users to remember multiple usernames and passwords.
4. Email-based invitation: In this approach, an email address is used to invite users to join an application or grant access to a specific feature or resource.

Here are some examples of applications that use email-based access:

1. Gmail: Google allows users to sign up for a Gmail account using their email address and password.
2. Microsoft Outlook: Microsoft allows users to sign up for an Outlook account using their email address and password.
3. Slack: Slack allows users to sign up for an account using their email address and password.
4. Dropbox: Dropbox allows users to sign up for an account using their email address and password.
5. Google Drive: Google Drive allows users to sign up for an account using their email address and password.

When implementing email-based access, it's essential to ensure that the email addresses are verified and secure to prevent unauthorized access.