What does e-Mail notification mean?

Your phone informs about new e-Mails on the mail server. The phones established every 15 minutes a connection to the Mail server and checks for new e-Mails. New e-Mails are shown in all registered SL37/S45/C47 and S67/S68 handsets. The handset resounds an acoustic signal, the message key is blinking and the letter symbol is shown in the display.