Prepare script for opensmtpd next upgrade

1 files changed, 12 insertions, 3 deletions

diff --git a/modules/private/mail/opensmtpd.nix b/modules/private/mail/opensmtpd.nix
index e4a6140..a7be066 100644
--- a/modules/private/mail/opensmtpd.nix
+++ b/modules/private/mail/opensmtpd.nix
@@ -15,12 +15,21 @@
     users.users.smtpd.extraGroups = [ "keys" ];
     services.opensmtpd = {
       enable = true;
-      serverConfiguration = ''
+      serverConfiguration = let
+        filter-rewrite-from = pkgs.runCommand "filter-rewrite-from.py" {
+          buildInputs = [ pkgs.python3 ];
+        } ''
+          cp ${./filter-rewrite-from.py} $out
+          patchShebangs $out
+        '';
+      in ''
         table creds \
           "${config.secrets.fullPaths."opensmtpd/creds"}"
-        # FIXME: filtering requires 6.6
+        # FIXME: filtering requires 6.6, uncomment following lines when
+        # upgrading
         # filter "fixfrom" \
-        #   proc-exec "${pkgs.procmail}/bin/formail -i 'From: ${name}@immae.eu'"
+        #   proc-exec "${filter-rewrite-from} ${name}@immae.eu"
+        # listen on socket filter "fixfrom"
         action "relay-rewrite-from" relay \
           helo ${config.hostEnv.fqdn} \
           host smtp+tls://eldiron@eldiron.immae.eu:587 \