Re: [courier-users]

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Bernd Wurst writes:

> Hi.
>
>
> On Thursday 24 April 2008, Sam Varshavchik wrote:
>> Define "primary MX". The MX record for the other machine must have a
>> numerically lower priority (higher order priority) than the MX record for
>> this machine.
>
> Well, I think I did this step correctly.
>
> To be precise, this is my setup:
>
>
> # dig -t mx suessmost.de
> [...]
> ;; ANSWER SECTION:
> suessmost.de. 3600 IN MX 5 d.ns.schokokeks.org.
> suessmost.de. 3600 IN MX 10 zucker.schokokeks.org.
> [...]
> zucker.schokokeks.org. 60 IN A 85.10.204.247
> zucker.schokokeks.org. 3600 IN AAAA 2001:6f8:1060::1
> d.ns.schokokeks.org. 3600 IN A 85.10.228.82
>
>
> The entry of the priority 10 mx does not affect anything.
>
> In the above scenario, the courier daemon listenes to port 25 only on
> specified IP addresses:
>
> # netstat -nplt|grep ':25'
> tcp 0 0 78.46.69.2:25 0.0.0.0:* LISTEN 19945/couriertcpd
> tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 19945/couriertcpd

The couriertcpd configuration is not relevant. The esmtp client has no
knowledge of how the tcpd daemon is configured.

> But:
> 78.46.69.2 and 85.10.228.82 are configured on the same device:

There you go. Courier obtains a list of all locally-configured IP
addresses. It sees 85.10.228.82, and sees that it's the highest priority
MX, so it concludes that this domain should be configured as a local domain.



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