I would like to control email notifications to Liferay strangers.

Issue

• How are strangers defined by Liferay?
• How can I control email notifications to strangers upon signup?

Environment

• DXP 7.3+

Resolution

• The SAML property defining unknown users as strangers was introduced in DXP 7.3. (1)
  • This property defines if users that do not exist already in the portal database should be classified as strangers.
  • Once classified, the portal instance’s existing stranger handling policy determines if the user should be automatically provisioned using information available from the Identify Provider (IdP)’s SAML assertion.
• There are two important settings for controlling email notifications to Liferay stranger upon registration:
  1. Setting 1: Instance Settings > User Authentication > Require strangers to verify their email address? (2)
     Or alternatively, adding to portal-ext.properties the following property:

     company.security.strangers.verify=false

  2. Setting 2: Instance Settings > Email > Account Created Notification > Enabled
• Enabling Setting 1 only sends new stranger accounts a password verification email, while Enabling Setting 2 only sends a Welcome message.
• If the desired goal is to have NO emails sent to newly created accounts for unknown users (strangers), please disable both Setting 1 and Setting 2.
• Note: Please note that an Admin account creating an account for a new user is different behavior from an unknown user (stranger) creating a new account. 

Additional Information

1. What's New in Liferay DXP 7.3 - Application Security: SAML configuration on instance level
2. Disable Email Verification in DXP 7.3
3. LPS-139699 - When creating a new user, redundant emails are sent out