<human>:  How can I delete old emails on my iPhone
<bot>: To delete old emails on your iPhone, open the Mail app and go to the mailbox that contains the emails you want to delete. Tap Edit in the upper right-hand corner. Select the emails you wish to delete, then tap the Trash icon in the bottom right-hand corner. Confirm the delete when prompted, and the selected emails will be moved to the Trash mailbox.