@jihadjimmy@the.asbestos.cafe @Suiseiseki@freesoftwareextremist.com Freedom to use, modify and redistribute both original and modified software in source codeI can do all these things with the Thunderbird source code. It is free software.Thunderbird has components and plugins that are necessary for it to interact with Gmail, Outlook and other major proprietary email providers and if it includes those it can't be free softwareIncorrect. The components themselves can be free software, even if they interact with proprietary systems.