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:
Here is some additional information. I created a workflow variable and set it to CurrentItem:Approver as a string. I then tried to use the variable as the recipient in the email To field. This also didn’t work, even though I confirmed that the variable was set to a valid email address.