[CentOS] Mailers and records MX

[Charles Lacroix]

Do you increment your SOA number when you update dns ?
did you dig from all your nameservers to see if they give you same
information for your MX records ?

Another thing i like to do when i am over with dns configuration is make sure
that everything in the report from this site:   http://dnsreport.com/ is ok
with no red or yellow :)



On Tuesday 20 June 2006 15:18, israel.garcia at cimex.com.cu wrote:
> More details:
>
> 1. The 3 servers are in diferents networks...
> 2. My higher's mx servers (mx 15 and mx 20) receive a lot of legitimate
> mail.. It also received a lot of spam too.... :-(
> 3. MX1 server is in the main network (backbone).. It's the most
> accesible network of the others Mx's
> 4. Mx 2 and Mx 3 are constantly receiving messages... Like if the dns
> were the same MX record for the three servers..
>
> Regards
> Israel
>
> -----Mensaje original-----
> De: replies-lists-centos at listmail.innovate.net
> [mailto:replies-lists-centos at listmail.innovate.net]
> Enviado el: Tuesday, June 20, 2006 1:04 PM
> Para: SV-Israel Garcia
> Asunto: Re: [CentOS] Mailers and records MX
>
> are you seeing spam or "real" mail through the higher ordinal MX hosts?
>
>
> spammers often target higher ordinal MX hosts because they assume that
> there are fewer blocks there (e.g., the user base isn't checked).
>
> if it's "real" mail, it can simply be that the lower ordinal MX hosts
> are seen as slow by some sender's mail hosts.
>
>   - Rick
>
>
>
>
> ------------ Original Message ------------
>
> > Date: Tuesday, June 20, 2006 02:01:06 PM -0500
> > From: israel.garcia at cimex.com.cu
> > To: centos at centos.org
> > Subject: [CentOS] Mailers and records MX
> >
> > I've installed bind on centos 4.3.. This is a part of my config file:
> >
> > example.com.        IN      MX  10   mail.example.com.
> > example.com.        IN      MX  15   mail1.example.com.
> > example.com.        IN      MX  20   mail2.example.com.
> >
> > mail.example.com.	IN A x.x.x.x
> > mail1.example.com.	IN A x.x.x.x
> > mail2.example.com.	IN A x.x.x.x
> >
> >
> > Every seems to be fine, but I'm constantly receiving messages in my 3
> > MX servers, even if mail.example.com (the less MX record) is available
> >
> > waiting for connections from outside... Why if my less mx record
> > server is available the others servers are constantly receiving
> > messages for my domain?
> >
> > Thanks for your time
> > Israel
>
> ---------- End Original Message ----------
>
>
>
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