diff --git a/hostconfig/thinkpad-nixos/hm.nix b/hostconfig/thinkpad-nixos/hm.nix
index 1c2eb25..6884aeb 100644
--- a/hostconfig/thinkpad-nixos/hm.nix
+++ b/hostconfig/thinkpad-nixos/hm.nix
@@ -115,6 +115,7 @@ in {
           review=thread:{tag:review}
           _unread=thread:{tag:unread}
           _todo=thread:{tag:todo}
+          ext/iommu=tag:iommu
 
           ${patchDirs}
         ''}";
@@ -294,6 +295,8 @@ in {
         spammySearch = lib.concatStringsSep " or " spammyFilters;
       in ''
         notmuch tag +work -- tag:new and 'path:work/**'
+        notmuch tag +iommu -new -- tag:new and to:iommu@lists.linux.dev and subject:'/\[PATCH/'
+        notmuch tag -unread -- tag:iommu and subject:'/^Re:/'
         notmuch tag +inflight -- tag:new and from:${config.workAddr} and subject:'/^\[PATCH/'
         notmuch tag +review -- tag:new and not from:${config.workAddr} and subject:'/^\[PATCH/'
         notmuch tag -unread +me -- tag:new and from:${config.workAddr}