Use Notes
Gmail has an offline feature. If you enable this option, then all your mails will be downloaded to your computer as soon as you connect to the Internet so that you can view them offline You can even compose an email which will be sent the next time you connect to the Internet.
Creating a new email
Yes, if you turn off the chat feature on Facebook for your iPhone, it will appear as though you are offline.
You can be offline to read the email, but you first have to be online to receive it. And you also have to be online to send an email.
you get online
Yes, you can send an email you have composed as long as there is a recipient email address provided.
There are a few ways for you to back up your email. You can try an offline mail client to backup and store your email offline and directly on your computer.
To compose a text message means to write it. Just like composing music... you write music if you are composing it.
Press Compose at the top left!
The only way is to use someone else's email address
From my experience with my iPhone 4, it is in my email box and in trash and in archive.
go to the email app.