-(void)string_format(dkim_spool_name, 256, "%s/input/%s/%s-%d-K",
- spool_directory, message_subdir, message_id, (int)getpid());
+(void)string_format(dkim_spool_name, sizeof(dkim_spool_name),
+ "%s/input/%s/%s/%s-%d-K",
+ spool_directory, queue_name, message_subdir, message_id, (int)getpid());