On 18 Feb 2001, Nikolaus Rath wrote:
> Every time exim receives mail, he tries to get an IPv6 AAAA record for
> a host named "nikratio". This is bad, because i am connected via dial-up.
> How can i prevent this?
dns_ipv4_lookup Type: boolean Default: false |
|
When Exim is compiled with IPv6 support, it looks for IPv6 address records |
(AAAA and A6) as well as IPv4 address records when trying to find IP |
addresses for hosts. However, if "dns_ipv4_lookup" is set, it disables DNS |
lookups for AAAA and A6 records. This is a fudge to help with name servers |
that give big delays or otherwise do not work for these new record types. |
If Exim is handed either of these record types as part of an MX lookup |
(for example), it still handles them, and may as a result make outgoing |
IPv6 calls. All this option does is to make it look only for IPv4-style A |
records when it needs to find an IP address for a host name. In due |
course, when the world's name servers have all been upgraded, there should |
be no need for this option. |
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
