[PLUG] mutt says mail is From "To Isaac Bennetch"

["Isaac Bennetch" <bennetch@gmail.com>]

Hi folks, I don't even know where to begin with this one.

I have had my mail working happily for some time; fetchmail grabs a
few POP accounts (which I sort in to different mailboxes for each
account with procmail), and mutt reads them all just fine. In my
.muttrc, I have a few lines of
folder-hook =mailboxname my_hdr From: foo@bar
to make my mail appear to come from the proper address. So far so good.

I just added a new POP account and in mutt where I would normally see
the name of the sender, I instead see "To Isaac Bennetch". My other
mailboxes are unaffected and continue to display the proper sender
name.

If I view the message headers, the correct "From: bar@baz" exists. If
I reply to a message, it tries to send it to me instead of the sender.

Any ideas where I can even start looking?
Thanks!
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