email won't download with WiFi turned on

This problem arose recently. I use the Inbox email app to download email from my Comcast and Gmail accounts. This works fine unless I have WiFi turned on, then the downloading icon spins, but nothing downloads. If I turn off WiFi, the download works. This happens on both mine and my wife's phones (LG G4). I have the latest Verizon software (VS98625A) installed. I have tried many things to fix this, but nothing so far has worked. Is anyone else having this problem?

I tried that and it had no effect. My WiFi router works fine for internet browsing and email on my laptop, and it works fine for internet browsing on my cell phone. It just won't permit me to download email thru it. I can download email by turning off the WiFi in my cell phone and just downloading it thru the Verizon cell network.

I'll try that tomorrow. BTW, the reason that I am using the general LG forum is that they have not set up one for the LG G4.

I just tried an experiment suggested by my wife. She had noticed that she could download email when she was signed on to a neighbor's WiFi, so I tried that and found the same thing. So, there must be something wrong with my router a Netgear WNDR 3800. I tried your suggestion to turn off iPv6 but couldn't find a way to do that.

I went back online and found several people complaining about Netgear routers with iPv6 turned on causing problem that were fixed by turning it off. So, I went back to the Netgear interface and finally found that I could turn iPv6 off. Guess what, my cell phone will now download email with WiFi turned on!!