Why is the Mail app on my iPod touch freezing or failing to open after I tap the icon?
If the Mail app on your iPod touch is unresponsive or "thinks" without opening, and you have already tried a standard restart, please try…
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Use the Mail app on your iPhone, iPad, or iPod touch — questions & answers
Read product questions and troubleshooting answers linked to Use the Mail app on your iPhone, iPad, or iPod touch.