You will have to contact your ISP and have them walk you thru the POP mail setup. You will need the setup for the outgoing server which should be something like pop.somethign.com so that you can send mail at the same time you should already have the smtp setting since you can reciveve mail. Just need the pop settings. If anything you can try to replace the SMTP settings. Just replace the SMTP.oran.com with pop.orange.com and see if it works.
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Phone: LG Optimus G Pro
Running: Stock JB from LG with Nova Launcher