Anyone have any solutions to the following WIFI related issues? Anyone one else have these issues?

1) Can't receive e-mails over WIFI. I get no noticifations of new e-mails while on WIFI only. (My building does not get cellular signal inside). E-mails catch up only when cellular data network is restored

2) Can't receive IM text messages (built in messaging app) over WIFI (related to #1)

3) Using WIFI seems to disable Cellular data when WIFI is no longer available. Switching airplane mode on then off seems on seems to clear the problem. Any other solutions?

Thanks