empty value: expected a MIME token
missing type: expected a MIME token
missing subtype: expected a MIME token
double slash: expected a MIME token
extra subtype: expected ';' before MIME parameter
missing slash: expected ';' before MIME parameter
slash in unquoted parameter: expected ';' before MIME parameter
duplicate charset: duplicate MIME parameter
quoted control: invalid control character in multipart header
escaped control: invalid control character in multipart header
comment control: invalid control character in multipart header
raw folding: invalid control character in multipart header
