Outlook for iPhone seems to have all the features of Mailbox:<p><a href="https:&#x2F;&#x2F;itunes.apple.com&#x2F;us&#x2F;app&#x2F;microsoft-outlook&#x2F;id951937596" rel="nofollow">https:&#x2F;&#x2F;itunes.apple.com&#x2F;us&#x2F;app&#x2F;microsoft-outlook&#x2F;id95193759...</a>