I believe this issue is related to the Doze feature in Nougat. If you search this board, you'll find how to fix the issue. Sorry I'm not more helpful I just recall something about Doze and syncing that was an issue.
On Wednesday, March 1, 2017 at 10:35:29 AM UTC-6, jon arras wrote: > > I have been using K9 for my work email for 5+ years now and have never had > this problem before. My Droid Turbo 2 on Verizon just updated to android > 7.0. Since then I cannot enable Syncing. When I manually check mail it > polls fine but will not pull it down on its own. > > > - POP3 account. > - Polling is set to every 15 minuets. > - Poll all folders. > - i gave k9 permission to use background data and unrestricted data > access. > > > any help would be appreciated. > > thanks > > Jon > -- You received this message because you are subscribed to the Google Groups "K-9 Mail" group. To unsubscribe from this group and stop receiving emails from it, send an email to k-9-mail+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.