@fbievan@tyil I thought that at first, but then I saw the proprietary plugins it recommends, which includes an EWS plugin and EME digital handcuff support.
In my opinion, free software doesn't recommend proprietary software when you select an option in the account setting to add an EWS account, or it at least notes that proprietary software is about it be installed, rather than only noting that the recommended plugin is "paid".
@jihadjimmy Ehh, trademarks alone don't make software nonfree unless you use those trademarks as a weapon to prevent sharing of the software.
One example would be to restrict verbatim copying of the software with the trademark.
It's acceptable to ask that the software's name be changed if modifications are made, just as long as changing the name is trivial and doesn't have side effects.
It isn't, the trademark alone already makes it nonfree, and it has components/implementations for major email service provider support that are proprietary.
@tyil >The components themselves can be free software, even if they interact with proprietary systems. The thing is, the recommended Exchange Web Services (EWS) plugin for thunderbird is proprietary software.
There is a free 3rd party EWS plugin available, but it only seems to work with an old version of Thunderbird
Evolution meanwhile has a free EWS plugin, although it sadly runs the proprietary login JavaScript (but if you can figure out how to get the required tokens without running proprietary software, you can provide those to evolution and it won't run the login JavaScript).
@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.
Freedom to use, modify and redistribute both original and modified software in source code are all four requirements for it to be free software. If you use trademarks to restrict any of these four it is de-facto not fully 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 software, if it recommends those then it's doing a disservice to users and it's rather irresponsible. Being mostly free software isn't being free software.
@jihadjimmy@the.asbestos.cafe@Suiseiseki@freesoftwareextremist.com Trademarks don't make source code non-free. I download the free software source code and compile it myself. Having optional dependencies to non-free software also does not make the source code non-free by default.
Non-free code makes things non-free. And the Thunderbird source code does not contain non-free code as far as I'm aware.