In recent years, e-mail has become widespread explosively and it became one of very important communication tools which anyone can use easily. Here, the wearable computing has also attracted a lot of attention. In wearable computing environments, a user brings and uses his/her own computer wherever he/she goes. Therefore, we can construct a new mail system by utilizing the features of wearable computing such as "hands-free", "always on", and "supporting daily life". In this paper, we propose a mail system for wearable computing environments, called Aware-Mail (Active Wearable system Applying Rule-based Engine for Mail). Our system provides new type of communications in wearable computing environments, such as automatic mail processing according to the user?s situation and exchanging information with other users by mail-based P2P communications.