How to open eml files?
I found that these instructions to be very helpful
For the love of command line tools, instead of the visual/heavy Thunderbird/KMail or Evolution.
sudo apt-get install mpack
Then to extract the eml contents
munpack 1.eml
In my case I need to use -t to get past the following error messages
munpack ./ServerPerformance.eml
tempdesc.txt: File exists
image001.jpg.2 (image/jpeg)
I then get every thing out like this.
munpack -t ./ServerPerformance.eml
part1 (text/plain)
part2 (text/html)
image001.jpg.3 (image/jpeg)
I saved attachment after I opened with File->Open Saved Messages... menu in Thunderbird.
If you have Chromium you can drop eml files on it and it will show properly. On my Raspbian Chromiun is default.