A number of mailing lists exists for interacting with both Tux Paint contributors and other users. For discussion lists, you must first be subscribed to a list before you may post a message to it. Lists are generally in the English language.

For Users:

Tux Paint users' mailing list

A discussion list for Tux Paint users (parents and teachers, for example) to discuss Tux Paint, ask questions, and share ideas and classroom activities.
tuxpaint-users | archives

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For Developers:

For people interesting in helping with the development of Tux Paint, whether it be by providing software updates, art submissions, translation work, or simply submitting comments and bug reports, there are four additional mailing lists available:

Tux Paint developer’s mailing list

General developer discussion, mainly regarding the software development of Tux Paint (including new feature plans, bug fixes, etc.)
tuxpaint-devel | archives

Tux Paint Internationalization (“i18n”) discussion

For posts regarding the translation of Tux Paint and technical (code) or grammatical (translation) issues are raised.
tuxpaint-i18n | archives

Tux Paint Rubber Stamps discussion

For posts regarding rubber stamp images and their categorization.
tuxpaint-stamps | archives

Tux Paint Maintainers discussion

For posts regarding Tux Paint's ports and release builds.
tuxpaint-maintainers | archives