But you can Open EML files in Microsoft outlook 2019, 2016, 2013, 2010,2007, 2003. By using third party tool named Systools EML to PST Converter Software.

What program should I use to open these attachments? Ron Cooper ANSWER: An EML file is simply another name for a standard RFC822 e-mail file. It can usually be opened with any e-mail program.

Better safe than sorry. Some file types stripped by my SMTP proxy are useless to the users (com, js, chm, cmd, cpl, bat, and 30-40 others). Useful ones that I strip are EXEs (no choice), eml and html.