I am getting the following error quite a bit. Is there something I can do to resolve it, or is it on the client's end? The address is my own account (Replaced with account and host). Please let me know if I need to attach more information. 553 5.3.5 mail.host10.host.com. config error: mail loops back to me (MX problem?) 554 5.3.5 account@host.com... Local configuration error I am also getting quite a few people whose addresses are coming up "already in subscriber list". When I look at the DIST file, not all of them are in it.