Task: Assess the emotional content of the tweet and classify it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best represent the tweeter's mental state.
Tweet: Hey @gmail why can I only see 15 sent emails? Where's the thousands gone?
This tweet contains emotions: 
anger, disgust, fear, pessimism