kumo.file_type.from_extension

local ft_list = kumo.file_type.from_extension(EXT)

Since: Version 2025.12.02-67ee9e96

The functionality described in this section requires version 2025.12.02-67ee9e96 of KumoMTA, or a more recent version.

Returns the list of file types that have the specified filename extension.

This function will return an array style table holding one entry for each file type that has the specified filename extension.

Each element of the array is a FileTypeResult.

local kumo = require 'kumo'
local utils = require 'policy-extras.policy_utils'

local markdown = kumo.file_type.from_extension 'markdown'
utils.assert_eq(markdown, {
  {
    name = 'Q1193600',
    media_types = {
      'text/markdown',
    },
    extensions = {
      'markdown',
      'md',
      'mdown',
      'mdtext',
      'mdtxt',
      'mkd',
    },
  },
})