Recently, Jose posted:

I really don't see a way to resolve all of the possible ways that
readers deal with thread headers into a universally consistent
practice. Someone will always come up with an app that does
something wacky.

Right. But if posters avoid following a prepend with a colon, this
issue won't be an issue.

What of those readers that truncate long lines or as in your app's case
oddly truncate subject lines that have mulitple "OT:" in them? I'd think
that the multiple tree roots would be the more desirable consequence.

Neil