I have a simple list with one field I named ‘Recipient’. It is a name field that allows you to select other sharepoint users. The workflow has one action, send email that does a workflow lookup at the Recipient filed on the current item and returns the field as a semicolon delimited email address. When I create a new item and select myself as the recipient the email gets sent but if I select anyone else the workflow goes into suspend status with the following status:
Lisa,
Are you using an custom list or a Task List? Can you try using a task list for this action and use the assigned to field in your workflow?
Also can you provide a screenshot of your workflow and the list?
Thanks,
Eric