diff --git a/hosts/kazuki/mail.nix b/hosts/kazuki/mail.nix
index f4b77b8..2e10884 100644
--- a/hosts/kazuki/mail.nix
+++ b/hosts/kazuki/mail.nix
@@ -12,6 +12,8 @@
     enable = true;
     fqdn = "mail.nrab.lol";
     domains = ["nrab.lol"];
+    lmtpSaveToDetailMailbox = "no";
+    recipientDelimiter = "+-";
 
     loginAccounts = {
       "1337@nrab.lol" = {