Task: Analyze the tweet's emotional connotations and classify it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best portray 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