Wietse: always nice with a bit of humor... :) ! I guess I then only need A records, as this will be our only mailserver inhouse for R&D. Benny: I guess this is not needed then, but just out of curiosity: for a internal sending-only mailrelay why can't I use RFC1918 IPs ?
1. Is best practice to set this up with bonding then ? 2. How do I solve client<->server communication, when requests will not get answered from same IP - or can it be - and if so: how do I do this, is there a how-to on setting this up on RHEL6 ?