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Topic: Ubuntu cannot resolve domains after iRedMail installation

Hello,

This happened twice already for me so I'm pretty sure it's not a coincidence.

Basically I'm running a fresh installation of Ubuntu 11.04, set up LAMP and proftpd which is all fine, but right after I install iRedMail 0.7.2, the system is then unable to resolve any domain names, which means tons of things including apt-get does not work because the system is then only capable of using ip addresses. The files /etc/hosts /etc/hostname and /etc/resolv.conf seem to be in order. Any ideas why this is happening?

Thanks.

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Re: Ubuntu cannot resolve domains after iRedMail installation

iRedMail won't change /etc/hosts, /etc/hostname, /etc/resolv.conf, It just simply copy them to /var/spool/postfix/etc/.

Are they changed after installing iRedMail?

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Re: Ubuntu cannot resolve domains after iRedMail installation

They are not changed and so I'm trying to figure out what on earth causes the machine to fail resolving the domains.

It's a VPS on OpenVZ by the way. Could anything in the iRedMail package in any way interfere with the dns?

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Re: Ubuntu cannot resolve domains after iRedMail installation

No idea yet.
Does your firewall rules of iptables block network port (53) of DNS service? You can check it with command:

# iptables -L -n

Rules are defined in /etc/default/iptables by default, created by iRedMail.