I've read some great info on NDR Attacks and SPF, and am following through by taking measures to close the door on spammers. However, there's something unusual happening to the Exchange Server Queue. Weird Default queues are appearing in the Exchange Server Queues view. I'm not sure what's causing them or how to delete them. My options are to right-click on the "Name", where the popup menu list is "Find messages..."; "Unfreeze", "Freeze", "Force Connection". I "Freeze" the newly created queue as soon as it appears, but how do I get rid of it? Better yet, how do I prevent it? Some of them are holding messages. So far today, 74 new Default queues have been created and I want to get rid of them.
Name: SmallBusiness SMTP connector - gmail.com (SMTP Connector)
Source: Default SMTP Virtual Server
State: Frozen (it's the only way I currently know of 'stopping' it)
Server platform is Small Business Server 2003 Std Ed. Exhange Server is v6.5.7638.1
Exchange System Manager > Server > Queues