According to the Help File for Recall:
However, when attempting to use this function in the middle of a battle (to avoid dying), you receive a response that you cannot take this action while fighting. Attempting to flee and then recall is unsuccessful since MOBs chase after the scent of weakness and blood.* Player characters under level 10 should use recall as an OOC
safety net. For example, a "life line" when you are lost or about to be
killed. It is not a personal teleporter to alleviate the drudgery of walking.
Also, while bleeding out, I tried to drag myself to a healer. I ran out of stamina, however. So, I attempted to recall and received the message: "You are too tired to do that."
This lifeline is not very effective.