When you convert EMLX to EML with attachments the best practice is to use a reliable email conversion tool that specifically supports attachments. So you can use Dailysoft EMLX converter software. This is an award-winning solution to make Apple Mail data compatible with several other platforms. It can convert a single EMLX file or multiple at a time by supporting bulk conversion. It exports EMLX files with all email attributes and helps avoid data mismanagement. It also provides a free demo trial before purchasing