One of our favorite iOS options is the option to group email messages that are part of a discussion (like a collection of replies to one specific email) into threads. It reduces the clutter in your inbox and we highly recommend it. You turn it on or off by launching the Settings app, tapping Mail, Contacts, Calendars and then toggling the Organize by Thread switch on or off.
We highly recommend that you leave it on. You can see an example of a thread in the first e-mail in the image below. There are currently two messages in the thread about the same discussion.
Compatibility: iPhone, iPod touch, and iPad.
