Retrieving the User's Email id Using User Name in the Context Browser Item in K2 Workflow
It will open below window
Open Workflow wizard, Drag Get Emails for SharePoint Users (SiteUrl, User Ids, K2 Label) from Inline Functions as shown in below figure.
Here we have to give SiteUrl, User Id’s & K2 Label.
SiteUrl: Current site URL
User Id’s: Now am taking Creted By email from Item Reference
K2 Label: K2
Click OK & Finish .
Now we can save and deploy the Workflow. Hope it’s helpful..:)