How to change the to: line?

Here's the rc.

:0
* ^to_group
! $FORWARDEE

        My question is. how can I regenerate the "to" line to
        something like "To: Team1 <Group(_at_)abc(_dot_)com>"

Would this work?

:0
* ^to_group
{
:0
| (formail -I"To: Team1 <Group(_at_)abc(_dot_)com>")
! $FORWARDEE