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# Authentication Identifiers Fields

Storefront Gateway provides **Admin console** controls that allows you to configure your authentication identifiers easily from the UI.

## Authentication Identifiers (Email) Fields

The table below outlines the related parameters for email user authentication settings:

| Setting | Description | Default |
| - | - | - |
| **Number of emails** | This setting defines the maximum number of alias emails that can be associated with one user (authN ID). | 3 aliases per user.**Note:** You can have a minimum of 1 alias per user up to a maximum of 5 aliases per user. |
| **Valid email pattern** | A regular expression pattern that defines what a valid email format is. a user's email will be rejected if the address doesn't follow this format. | `.+@.+\..+` |
| **Pattern to parse email address for obfuscation rule** | A regular expression pattern to parse email addresses for obfuscation and how user email addresses are grouped. | `(\w{1})(\w+)?(@.*)` |
| **Email obfuscation rule** | A regular expression pattern that defines the display of an obfuscated email. | `$1****$3` |
| **Allow authentication from an unverified email** | During MFA, the user is prompted to validate the selected channel. When the switch is on (enabled), Storefront Gateway allows a user to login with an unverified email. | Off**Note:** By default, Storefront Gateway requires a user to login with a verified email. |
| **Email domain Block-list** | Create a list of blocked or prohibited email domains that can't be used by the users. **Note:** Each email domain entry needs to be separated with a comma. | Off**Note:** The block-list is enabled once you enter an email domain and save your change(s). To remove an entry, select the email domain and delete it. |
| **Enable allowed email domain list** | Enable this setting to create a list of allowed email domains that can be used. The users can only use email domains that are present on this list. **Note:** Each email domain entry needs to be separated with a comma. | Off**Note:** The allow-list is enabled once you enter an email domain and save your change(s). The allow-list supersedes the block-list. To remove an entry, select the email domain and delete it. |

## Mobile Phone Number Fields

The table below outlines the related parameters for mobile number user authentication settings:

| Setting | Description | Default |
| - | - | - |
| **Number of mobile phone numbers** | This setting defines the maximum number of alias mobile phone numbers that can be associated with one user. | 3 mobile phone numbers per user.**Note:** You can have a minimum of 1 mobile phone number per user up to a maximum of 5 mobile phone numbers per user. |
| **Valid mobile number pattern** | A regular expression pattern that defines what the valid mobile number format is. | `^(?:[0-9] ?){6,14}[0-9]$` |
| **Mobile number obfuscation grouping pattern** | A regular expression pattern to parse mobile numbers for obfuscation and how user mobile numbers are grouped. | `^\(?([0-9]{1})([0-9]{2})\)?[-.\s]?([0-9]{3})[-.\s]?([0-9]{3})([0-9]{1})$` |
| **Mobile number obfuscation rule** | A regular expression pattern that defines the display of an obfuscated mobile number. | `($1**)***-***$5` |
| **Immediate verification notification for an unverified mobile** | When enabled, Storefront Gateway sends an immediate verification notification for an unverified mobile to the specified channel. | Off |
| **Parent topic:**[Authentication Identifiers Settings](userAuthenticationSettings) | | |


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