diff --git a/nixbld-etc-nixos/configuration.nix b/nixbld-etc-nixos/configuration.nix
index 6a12e5b..3a0438d 100644
--- a/nixbld-etc-nixos/configuration.nix
+++ b/nixbld-etc-nixos/configuration.nix
@@ -16,10 +16,6 @@ in
     [
       ./hardware-configuration.nix
       ./backup-module.nix
-      (builtins.fetchTarball {
-        url = "https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/-/archive/90e8c150a02d4a5108f1f1e5cb7bab2cb1eb4baf/nixos-mailserver-nixos.tar.gz";
-        sha256 = "0xywkr125m9n0iax62bcn7x754clcs1jrl0f9l767yjy6g3qws92";
-      })
     ];
 
   # Use the systemd-boot EFI boot loader.
@@ -709,18 +705,6 @@ in
   };
   services.jitsi-videobridge.openFirewall = true;
 
-  mailserver = {
-    enable = true;
-    localDnsResolver = false;  # conflicts with dnsmasq
-    # Some mail servers do reverse DNS lookups to filter spam.
-    # Getting a proper reverse DNS record from ISP is difficult, so use whatever already exists.
-    fqdn = "42-200-147-171.static.imsbiz.com";
-    domains = [ "nmigen.org" ];
-    loginAccounts = (import /etc/nixos/secret/email_accounts.nix);
-    certificateScheme = 3;
-  };
-  security.acme.certs."${config.mailserver.fqdn}".extraDomainNames = [ "mail.nmigen.org" ];
-
   # This value determines the NixOS release with which your system is to be
   # compatible, in order to avoid breaking some software such as database
   # servers. You should change this only after NixOS release notes say you