how can I delete all emails on my nokia 630 phone?
If you're using the default mail client on your phone, then the information on [this link]
I've had a little look online and I'm not seeing a delete all function, although if there's a 'Select All' function you can press that and then press delete.
I hope this helps and I'd love to hear how you get on
New around here? To find out more about the Community check out our Getting Started guide