[3.13] gh-138515: Include email module in Emscripten build (gh-138520) (gh-138534)

gh-138515: Include email module in Emscripten build (gh-138520)
(cherry picked from commit d1d84098f6ac408ef36f1a85a4bc80d857d0f4ff)

Co-authored-by: Gyeongjae Choi <def6488@gmail.com>