Question: delete multiple emails
I'm trying to manage the storage on my iPhone 6, which indicates that Mail is using more than 2GB of storage on my phone. Is there a way to delete the emails in bulk? I don't see a way to "select all" other than marking all as read or unread.
And a related question: If I delete emails from my phone, will they remain on my desktop computer? My email accounts are IMAP.
iPhone 6, iOS 10.1.1