Smiley wrote:

Where can I disable the option to send message to Sent Item of
delivery location

ToolsOptionsE-mail Options. Uncheck "Save copies of messages in Sent
Items folder". Certainly you could have found that for yourself in about
ten seconds.

and use rules to move outgoing messages to a folder
of my choice ?

ToolsRules and AlertsNew RuleStart from a blank ruleCheck messages after
sendingNext. Select the conditions you want and click Next. Select the
"Move a copy to the specified folder" action. In the Step 2 pane, click
"specified" and specify the folder where the messages should move. Click
Next and follow the remaining prompts.
--
Brian Tillman