[Pkg-exim4-users] hubbed_hosts, was: Re: Sending outgoing email into the internet, incoming to smarthost

Jeroen van Aart kroshka at atypon.com
Fri Jan 4 00:13:02 UTC 2008

Very late reply...

Marc Haber wrote:
> On Tue, Oct 02, 2007 at 02:46:35PM -0700, Jeroen van Aart wrote:

> Postini is a commericial Spam Filter? Is it a software, an appliance
> or a service? Wikipedia seems to be not very helpful here to me.

It's a commercial spamfilter service. Basically you add their smtp 
servers in your mx records and configure their software to send to your 
smtp servers. Allowing you to do things like load balancing smtp servers 
  (so no need of round robin dns resolving) and of course various 
spamfilter tweaks. It works fine for the most part and it saves a lot of 
hassle doing load balancing yourself. It remains to be seen how well it 
works in the long run (they were bought by google...).

>> As a side note, for a while now I am using hubbed_hosts to correct a dns 
>> issue with a remote smtp server. I found out the hard way that using 
>> tabs after the "domain:" entry will break it.
> How does it break? I cannot reproduce this issue:
> $ cat /etc/exim4/hubbed_hosts
> realnechayev.zugschlus.de: nechayev.zugschlus.de
> foo.zugschlus.de:               nechayev.zugschlus.de

In the file /etc/exim4/hubbed_hosts if there are entries like this:

Where there is a tab or 2 after "domain2.organisation:" to align the 
entries, it will not read the ips correctly. I believe the tabbed entry 
will be not be read. So domain2.organisation will not resolve to either or, but to whatever to dns says.

Best regards,

More information about the Pkg-exim4-users mailing list