https://gitlab.synchro.net/main/sbbs/-/merge_requests/442#note_5390

I suspect with this change, textIsUTF8 will *always* be `true`. Are you actually seeing messages with subjects that are *not* valid UTF-8?

All ASCII strings are valid UTF-8, while not all UTF-8 strings are valid ASCII.

You probably mean to write something more like this:
```
str_is_ascii(str) === false && str_is_utf8(str) === true
```
--- SBBSecho 3.20-Linux