I have an iPhone 5.
I have this issue for over an year now, my iCloud (on the web and on my phone) tells me I am using 5.08 GB in mail even though my entire iCloud mail box (on the web) is empty.
My inbox, sent, drafts, thrash, junk, all folders are empty.
http://i.imgur.com/inGZuGU.png
All my mails keep bouncing back.
I contacted Apple support, they couldn’t fix it, they sent my call to some Singaporean service center where they couldn’t fix it either.
Please help me, I don’t know what to do.