Don't open the mail base until/unless you need to send a message.

exec/chkspace.js

@@ -20,12 +20,7 @@ for(i=0;i<argc;i++)
 if(!dirs.length)
 	dirs.push(system.temp_dir);	// default to temp dir if none specified
 
-msgbase = new MsgBase("mail");
-if(msgbase.open()==false) {
-	log(LOG_ERR,"!ERROR " + msgbase.last_error);
-	exit();
-}
-
+var msgbase;
 for(i in dirs) {
 
 	var freespace = dir_freespace(dirs[i],1024);
@@ -33,6 +28,13 @@ for(i in dirs) {
 	if(freespace==-1 || freespace >= minspace)
 		continue;	// everything's fine
 
+	if(!msgbase) {
+		msgbase = new MsgBase("mail");
+		if(msgbase.open()==false) {
+			log(LOG_ERR,"!ERROR " + msgbase.last_error);
+			exit();
+		}
+	}
 	log(LOG_WARNING,"!Low disk space: " + freespace + " kilobytes on " + dirs[i]);
 
 	hdr = { to: 'sysop', to_ext: '1', from: 'chkspace', subject: 'Low disk space notification' }
@@ -44,4 +46,5 @@ for(i in dirs) {
 	log(LOG_INFO,"E-mailed low disk space notification to sysop");
 }
 
+if(msgbase)
 	msgbase.close();