Migrating to sieve

Hi,

As I migrate to sieve, I would like to carry over the logic I had in procmail rules, which let me take all mail where I'd never sent email to that address into a final spam catchall, which I called "neversent."

I see that sieve can't run external programs, and I wonder if that means I'm SOL, or is there an alternate approach that does roughly the same thing?

(I understand the general security logic for that decision. I have root access on the server in question if that helps.)

Thank you for any help you can provide!

Adam

The procmail code was:

# a bunch of complex shell script to extract From: into a variable of that # name.

:0:

• ^TO_$ME
• !? fgrep -q --ignore-case -e "$FROM" $HOME/.lbdb/m_inmail.list neversent

along with a procmail-outbound setup of: :0hc | lbdb-fetchaddr -a

:0 ! "$@"