diff --git a/home/common/aerc.nix b/home/common/aerc.nix
index fb86cf5..20ad78a 100644
--- a/home/common/aerc.nix
+++ b/home/common/aerc.nix
@@ -9,6 +9,7 @@
         msglist-scroll-offset = "1";
         threading-enabled = " true";
         threading-by-subject = "true";
+        message-list-split = "4";
         index-columns = "flags>=,date<=,name<20,subject<*,notmuch>=";
         column-notmuch = ''
           {{- (map .Labels (exclude .Folder) (exclude "replied|passed|attachment|flagged|unread|draft") | join ",") -}}'';