Postfix installation breaks domain name resolution
I have a VPS that I am preparing, and ran into a problem that I narrowed down to postfix. If I start with a fresh, minimal Debian 5.01 VPS, do aptitude update, followed by aptitude full-upgrade, everything is fine. I then install postfix ("aptitude install postfix"), and domain name resolution is mostly broken thereafter. I can't ping anything by domain name, but I can ping it by IP address. I say domain name resolution is mostly broken because if I installed dnsutils before postfix, I can still do a dig or nslookup on a name. However, use of domain names seems broken in all other aspects, so the VPS is dead, and if I reboot it, I can't even log in.
It seems odd that postfix would cause the problem. Is there anything I can do to fix it?
Last edited by corkypa; 07-24-2009 at 11:26 PM.
Reason: noticed word missing