SharePoint Workflow Email From Display

I have SharePoint 2010 workflows that send emails to various users. Up until recently, the From field displayed the name of the library that generated the workflow email with our SharePoint email address in parentheses (i.e. LibraryName ). We made an unrelated change to our SharePoint mailbox in Exchange, to direct the emails to a distribution group. Now, the workflow emails come across as being from SharePoint regardless of what library triggers them. Any ideas on how to get the library name to display in the From field?