The Exim development team released version 4.100-RC3 on August 13, which includes native DMARC evaluation, expanded log selectors, and a fix for musl DNS out-of-bounds reads, while removing outdated malware scanner bridges and legacy protocol support. This release candidate signifies a feature freeze, with the official stable version expected to be released within weeks, and operators are encouraged to test it now. Notable improvements include the ability for Exim to validate DMARC records internally, expanded logging capabilities, and various fixes for security vulnerabilities. The project has also announced a new versioning structure that distinguishes between security patches and major updates, aiming to streamline future updates and maintenance

Exim 4.100-RC3 Ships With Native DMARC and Feature Freeze

The Exim development team released 4.100-RC3 on August 13, marking the third and final release candidate before the stable major update ships. The new branch introduces native DMARC evaluation, expanded log selectors, and a musl DNS out-of-bounds read fix for containerized environments. Legacy malware scanner bridges and outdated protocol support have been removed alongside a new versioning structure that separates security patches onto a dedicated branch. Operators running mail infrastructure should test the release candidate now, with the official 4.100 tag expected within weeks.

Exim 4.100-RC3 Ships With Native DMARC and Feature Freeze @ Linux Compatible