I have created a Sharepoint Workflow in Sharepoint 2010 Designer that is currently set up as follows:
If Variable:prevAssignedTo not equals Current Item:Assigned To Email Current Item:Assigned To Then Set Variable:prevAssignedTo to Current Item:Assigned To
This workflow functions, but it sends the email any time the list item is updated, even if there is no change to the Assigned To.
I also tried using a boolean variable and helper columns as outlined on another site but it never triggered an email to send at all.