Do not use Vita Email Hacker anymore!
I really need to edit the tutorial a bit... It's not reliable anymore and it's because of the fact that it just names the attachment as "mail.db" and not as "\..\..\..\email\message\mail.db" like you correctly pointed out... (
@RazorX2014, think you could do some tweaking to your app plz? I was really fond of your app for a while, but it's turning out to be a bit of a pickle for the newbies in later versions of that program now...
)
What you can do is install and set up Thunderbird, forward
this .eml file through Thunderbird
without modifying anything except for the recipient, which will be yourself, of course. And when you click the forwarded attachment on your Vita, now it should hopefully work!