Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture 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