Hello there,
I just did an export of one of my password files and sent it over Slack.
Slack read the whole file and you can clearly see the the files, could you please elaborate?
When you export vaults from password managers, they're more-often-than-not unencrypted because you exported them from their native format. Exporting to an encrypted file isn't super useful if you're trying to import them somewhere else using a generic format. We could certainly add support for encrypted exports but we'd need someone to contribute a common encryption standard for exported vaults.
This is entirely intentional, more or less.
Regarding slack: It is your responsibility to ensure you know what you're transferring - this has nothing to do with Buttercup.