General spam prevention methods
You can employ a variety of methods for preventing spam.
Moderating new user registrations
You can assign a moderators to approve or reject new user registrations. Note that this is possible, if your community is not using SAML.
For more information, see Setting up user registration moderation.
Enabling Captcha for new user registrations
You can require that users type in a Captcha image when they register for the community. For more information, see Configuring self-service user registration.
Requesting email validation
You can require that the application send an email to the address a new user provides at registration. The user must then use a link in the email to complete registration. For more information, see Configuring self-service user registration.
Enabling Captcha at user login
You can require that users type in a Captcha image when they log in to the community. For more information, see Configuring Login settings.
Limiting permissions for guest users
You can disable the ability of guests to create content by limiting the permissions of Everyone to view-only (guests are members of Everyone social group). And you can give only registered users (All Registered Users social group) the ability to create content. For more information, see Managing permissions.
Enabling Akismet for blog comments
You can use Akismet service to help prevent blog comment spam. For more information, see Configuring blogs system-wide.
Configuring keyword and message governor interceptors
You can limit the frequency of posts and search for spam keywords. For more information,see Interceptors overview.
Enabling abuse reporting
You can allows users to report abusive content by clicking an abuse label on the content, which is then sent to a moderator. For more information, see Setting up abuse reporting.
Enabling content moderation
You can enable content moderation so that users must submit content for approval before it's published in the community. For more information, see Moderation.
Enabling link moderation
You can required moderation of content that contains external URLs that are not whitelisted. You can also configure link moderation so that all content by users who do not have a certain amount of status points is automatically moderated.
You can enable link moderation in the Admin Console, .