How to save emails that I would like to send when off line

Hello Parahaki,

Write your email as you would normally do and tap Cancel (upper left). You'll be offered to save the draft. Then, once you are back online, go to the Draft folder, open your email and send it.

Otherwise, if you send an email offline, it will get saved into the Outbox folder, waiting for you to be online. As soon as you are back online, the Mail application will send automatically all the emails in the Outbox folder.