I have a mailbox with BoxTrapper set up. It is working fairly well. The problem is that it sends verification messages out to spammers with potentially forged mailboxes or unresponsive mail servers. The user reports that they are getting 10+ spam emails a day with the following content: ------------------------- Code: From: Mail Delivery System [mailto:xxx@mydomain] Sent: Wednesday, July 04, 2012 7:56 PM To: <Mailbox> Subject: Warning: message 1Sm5oy-0008NX-Rt delayed 24 hours This message was created automatically by mail delivery software. A message that you sent has not yet been delivered to one or more of its recipients after more than 24 hours on the queue on <MyDomain>. The message identifier is: 1Sm5oy-0008NX-Rt The subject of the message is: Your email requires verification verify#U3XizwFbZzZndfOII3vC1-1341332364) The date of the message is: Tue, 03 Jul 2012 09:19:24 -0700 The address to which the message has not yet been delivered is: firstname.lastname@example.org Delay reason: SMTP error from remote mail server after initial connection: host asp.iloveyougolf.com [18.104.22.168]: 421 asp.iloveyougolf.com out of connection slots No action is required on your part. Delivery attempts will continue for some time, and this warning may be repeated at intervals if the message remains undelivered. Eventually the mail delivery software will give up, and when that happens, the message will be returned to you. -------------------------- How can I disable these emails to the user? They do not need them and are asking me to turn them off, even if for legitimate email.