Not able to send or recieve emails?

[AC Question]

says my storage space
is getting low. Service has been disabled.

 

[Rukbat]

Move some of your pictures, videos, songs, etc., to a computer or to your external SD card to free up some space. Also Settings/General/Storage. When Cache finishes calculating, press it to free up some more space. And look at Low on Space? Dump logcat in case you have an old log file wasting space.