apt-get install fetchmail sendmail

vim /root/.fetchmailrc
poll <pop.server.de> protocol pop3 username <pop login> password <pop pass> is <local username>
chmod 600 /root/.fetchmailrc

test
fetchmail -v –keep -a

später:
fetchmail -a » /var/log/fetchmail 2>&1

crontab
min h d m y
*/15 5-20 * * * root /root/bin/email