Don't replace "." with "/" in IMAP folder name

[Caleb M.]

I'm trying to store my sent messages in my IMAP INBOX.Sent folder.
I tried this:

        set record="imaps://mx.sdf.org/INBOX.Sent"

Now when I send a message, mutt says:

        Create INBOX/Sent? ([yes]/no):

So mutt is replacing the "." with a "/".  Can I make it stop doing that?
Is there any way to use an IMAP folder with a name such as INBOX.Sent?

Thanks,
Caleb