use enableACME for all virtualHosts

sp-modules/simple-nixos-mailserver/config-paths-needed.json

@@ -11,5 +11,6 @@
   [ "services", "postfix", "user" ],
   [ "services", "redis" ],
   [ "services", "rspamd" ],
+  [ "security", "acme", "certs" ],
   [ "selfprivacy", "modules", "simple-nixos-mailserver" ]
 ]

sp-modules/simple-nixos-mailserver/config.nix

@@ -66,9 +66,7 @@ lib.mkIf sp.modules.simple-nixos-mailserver.enable
       "admin@${sp.domain}" = "${sp.username}@${sp.domain}";
     };
 
-    certificateScheme = "manual";
-    certificateFile = "/var/lib/acme/${sp.domain}/fullchain.pem";
-    keyFile = "/var/lib/acme/${sp.domain}/key.pem";
+    certificateScheme = "acme";
 
     # Enable IMAP and POP3
     enableImap = true;