Speak with Tabetha at her farm in the Quagmire.
Deep in the heart of the swamp lives an old woman named Tabetha. We've never really known much about her, save that she's a good deal older than she appears. She's helped us from time to time and helped keep the peace here between the Horde and our forces.
She used to keep in regular contact, but we haven't received one lately.
Could you check in with her when you have time? Just follow the road beyond North Point Tower, where it turns south and into the Quagmire. You can see her farm from the road.