I'm guessing the easiest way to get around this is for someone to just find the password to the first door in the game files
https://www.reddit.com/r/Voicesofthevoid/comments/1bjgt6x/i_figured_out_the_pass...
This is an older post so it doesn't work, but it'd be the only way to consistently get to the omega binder, as it doesn't seem the mailbox works. If anyone has the knowhow to get the code you'd save a lot of people a lot of trouble