I have a Nexus 7 - 4.2.1... just updated. Email will not properly sync. All accounts are either IMAP or Exchange. Settings / Data Usage / Menu / Auto-Sync Data already checked This is very frustrating - I have an iPad and an iPhone also... and do not see this issue with the iOS devices. Literally... I'm sitting in front of Outlook 2010 Send multiple messages to 4 Exchange accounts, and several IMAP accounts. All message arrive in Outlook 2010... as well as my iOS device. Sometimes the Nexus 7 will update immediately (if Exchange) but always lag days and days behind wit IMAP. edit: i forgot to add... removing and recreating the email account fixes the problems. I've done that several times - with about 5 email accounts so far (both imap and exchange). I just sent another test message to one of the my accounts... from my iPad this time... iPad - message arrive, iPhone - message arrived, Oyrlook 2010 - message arrived Nexus 7... still looking at messages 4 days old... Let me correct this (again)... the Nexus 7 literally (as I was getting ready to hit the Save button to update my post) dumped 4 days of emails onto my device. WTH. I cannot run my business this way.