Release Notes: This release adds new configuration settings that suppress the generation of backscatter bounce-backs from Courier.
Release Notes: This release fixes a bug in the webmail server that can be triggered by external filesystem corruption, whereby the server will either be unable to open a folder, or will consume 100% of the CPU.
Release Notes: This release adds ratefilter, a rate-limiting mail filter.
Release Notes: This release adds support for DNSWLs (DNS-based whitelists, as opposed to blacklists), as well as DNSBL/DNSWL IPv6 support, and improves fallback error recovery when sending mail to a server which claims to support encryption, but actually fails to do so.
Release Notes: This release adds additional configuration and customization options for mail servers with multiple IP addresses.
Release Notes: This release fixes a memory corruption bug in the Webmail server and compilation errors when using recent versions of OpenSSL.