I mailed 18,000 people a message that turned out to contain an embedded graphic image and resulted in 280K file size for each message. The mailing process is painfully slow with this size message, so I want to know how to terminate the mailing and clear the pertinent queues and then repeat the mailing after removing the offending graphic. How do I terminate or abort a mailing after the 18000 messages are built, but before a majority of them have actually been mailed?