bieber.pf-control.de.	30 IN TXT "v=spf1 mx a ip4:176.96.136.48/28 -all"

bieber.pf-control.de.	30 IN A	176.96.136.20

Mail exchangers:
bieber.pf-control.de.	30 IN MX 10 bernd.php-friends.de.