Sony PEG-NR70V - Manual (Page 130)

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Saving an unfinished message
Tap Draft instead of tapping Send (see step 5 on page 129).
To view your saved drafts, tap the arrow V in the top right corner of
the screen, and select Draft.
Sending e-mail later from the Outbox
Tap or .
All e-mail messages stored in the Outbox category are sent at once.
Reading and writing e-mail