Email not being forwarded

[rsthomas]

I'm not exactly sure how the sentora's forwarding form is designed to work but  for postfix itself forwarding is being done thru virtual maps.Now postfix is relaying thru dovecot, which means a dovecot.sieve should handle the forwarding. Not sure at which step is the sieve file suppose to be created but you have 2 options, eider generate it using roundcube, or manually create it.

Code:

require ["copy"];
if address :is "to" "user@example.net"
{
   redirect :copy "other@example.net";
}

Where does the above code go; into which file? Is the require line supposed to be the require() function?