[Fix] Ignore content type/subtype case

to comply with RFC 2045

diff --git a/src/plugins/lua/mime_types.lua b/src/plugins/lua/mime_types.lua
index 1395149b6dc7038abdfadca5ca776512827c77d0..e1b2123f44aea9d91995bf49235df9bb0917af04 100644 (file)
--- a/src/plugins/lua/mime_types.lua
+++ b/src/plugins/lua/mime_types.lua
@@ -147,7 +147,7 @@ local function check_mime_type(task)
       else
         -- Check for attachment
         local filename = p:get_filename()
-        local ct = string.format('%s/%s', mtype, subtype)
+        local ct = string.format('%s/%s', mtype, subtype):lower()
 
         if filename then
           filename = filename:gsub('[^%s%g]', '?')