Today I had an issue with Microsoft Exchange 2007 adding my CA eTrust SCM gateway to it's IP Block List. This caused all inbound emails to be delayed and dropped into Dead mail.
The recovery is pretty simple if you know what you are doing.
First you have to rename all of the .bad files to .inb. To do this simply open up a command window, change directories to (by default) c:\Program Files\eTrust SCM\Workspace\SMTP\Deadmail. Then "rename *.bad *.inb" without the quotes. Now that you have renamed all of the bad files you have to release them from the deadmail queue. To do so run the program "C:\Program Files\CA\eTrust SCM\bin\queues.exe"
Here you need to check the box next to "dead mail" and enter in the IP address of the SMTP server to forward the mail to and the port. Then click on the button. It might take some time to send all of the email through depending on server load and number of stuck emails.
On a side note while it eTrust SCM works on a x64 platform, offically its not supported or recommended.