Make iPhone Mail Load Faster
To get to the most recent messages faster in iPhone Mail:
Open Settings from the iPhone Home screen, then select Mail. Choose Preview, then select None.
Now, you’ll only see the recipients and subject lines in your Mail inboxes, and your phone won’t have to load parts of the messages.
Earlier versions of iOS let you limit the number of messages Mail would load at a time, but this feature is no longer available.
