If you use Gmail like a lot of us do, you may have noticed that when swiping across an email to delete it, you’ll only have an Archive option. Well, if you’ve set up your email as a Microsoft Exchange account, you’ll have the option to delete the mail rather than just archive it. Here’s how.
First up, be sure and set up your email account according to these instructions here.
Once that’s taken care of, head on over to m.google.com/sync on your iPhone, iPod touch or iPad Safari web browser app. You’ll be asked to sign in, and then you’ll see a list of the devices you’ve set up to sync with Gmail this way.
Tap the name of the device you’re working on, and you’ll get some options. See the Enable “Delete Email as Trash” for this device checkbox? Check that one to enable deleting instead of archiving. You can also use this moment to sync any calendars to the device as well, by checking the ones you want to sync.
Scroll to the bottom, and tap Save. You’ll now be able to return to the Mail app and swipe left to Delete, not Archive.
- Source iPhone Hacks