Email OTP Token


Email Token configuration

The Email OTP token creates a OTP value and sends this OTP value to the email address of the uses. The Email can be triggered by authenticating with only the OTP PIN: First step

In the first step the user will enter his OTP PIN and the sending of the Email is triggered. The user is denied the access. Seconds step

In the second step the user authenticates with the OTP PIN and the OTP value he received via Email. The user is granted access.

Alternatively the user can authenticate with the transaction_id that was sent to him in the response during the first step and only the OTP value. The transaction_id assures that the user already presented the first factor (OTP PIN) successfully. Configuration Parameters

You can configure the mail parameters for the Email Token centrally at Config -> Tokens -> Email.

Mail Server

The name or IP address of the mail server that is used to send emails.


The port of the mail server.

Mail User

If the mail server requires authentication you need to enter a username. If no username is entered, no authentication is performed on the mail server.

Mail User Password

The password of the mail username to send emails.

Mail Sender Address

The mail address of the mail sender. This needs to correspond to the Mail User.

OTP validity time

This is the time in seconds, for how long the sent OTP value is valid. If a user tries to authenticate with the sent OTP value after this time, authentication will fail.


Whether the mail server should use TLS.