Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: Hey @gmail why can I only see 15 sent emails? Where's the thousands gone?
This tweet contains emotions: 
anger, disgust, fear, pessimism