Brother MFC-5890CN - Manual (Page 115)

Control panel setup
105
6
For Touchscreen models
6
a Press MENU.
b Press a or b to choose Network.
c
Press a or b to choose E-mail/IFAX.
d
Press a or b to choose Setup Mail RX.
e
Press a or b to choose Auto Polling.
f
Press On or Off.
If you choose On, go to g.
If you choose Off, go to h.
g Choose 1Min, 3Mins, 5Mins, 10Mins, 30Mins or 60Mins.
h
Press Stop/Exit.