Open-Xchange and Dovecot release Dovecot Anti-Abuse Shield

Open-Xchange is pleased to announce the product release of Dovecot Anti-Abuse Shield.

Dovecot Anti-Abuse Shield is included with Dovecot Pro, but works with both Dovecot Pro and OX App Suite as a component to protect against login/authentication abuse.

Anti-Abuse Shield runs on a cluster of servers, and integrates with both OX App Suite and Dovecot to detect abuse, brute force attacks and also to enforce common authentication/authorization policies across the platform.

Please note: Dovecot Anti-Abuse Shield is only available for customers who have a valid Dovecot Pro license and Dovecot Pro v2.2.25.1. onwards.

Features include:
  • Replicated/clustered architecture shares login reports between all cluster servers to provide a single overview of abuse
  • Scriptable policy language using the Lua language, the daemon functionality can now record and protect against a wide range of abusive behaviors as well as implementing specific customer security policies
  • DNS lookups for looking up blacklisted IPs or domains
  • GeoIP lookups now incorporated into policy decisions
  • Rate-limiting and tarpitting enabled and enforced based on IP address, login name, GeoIP location, time-windows, etc.
  • Flexible in-memory statistics database a versatile and extensible in-memory database to store abuse statistics from just a few minutes to hours
  • Integration with customer authentication/authorization systems customers can use the open HTTP REST API to benefit from the protection of the anti-abuse daemon in their own authentication/authorization systems
  • Admin console for retrieving statistics and querying server state

A more detailed overview of the main functions and features of Dovecot Anti-Abuse Shield can be found at:

A Whitepaper can be found at:

In order to evaluate Dovecot Anti-Abuse Shield please contact Open-Xchange Sales. Open-Xchange Sales will process the request and then provide pricing and license keys.

For details of how to install and configure Dovecot Anti-Abuse Shield please refer to the instructions given at: