https://gitlab.synchro.net/main/sbbs/-/commit/a3b2f9e2d2cf3494bf70f54f77ebdfb8fa49976b#note_7756

So, this is actually likely not a bug...

Per [FTS-5005](http://ftsc.org/docs/fts-5005.003), a ^ prefix requests that the mailer delete the file after it is sent. In The Clans, you can configure the mailer as "Binkley" or "Not Binkley".

When it's Binkley, it prepends the ^ to the path, and when it's not Binkly, it adds a "FLAGS KFS" kludge line to the message.

So while you do need to skip it to check if the file exists and potentially fix the case, it should also pass it through to the FLO file... characters that should pass through are '#', '^', '~', '-', '!', and '@', and '^'.
--- SBBSecho 3.30-Linux
* Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)