Re: Running own mail server

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Ah yes I forgot to provide links to those most helpful pieces of information.

On 11/3/06, Bryan Hepworth <[email protected]> wrote:

> Edward Dekkers <[email protected]> wrote:
>> Hey there guys,
>> for years I've run fetchmail to grab mail from my isp in multidrop mode.
>> Now, my area is finally ADSL enabled. The ISP I'm going with gives out
>> free static IP addresses. I've also bought a domain name which is
>> currently parked.
>> I'm pretty sure I can get the sendmail part sorted, but DNS has me
>> confused. At the domain name site, I can put in two name server fields.
>> Originally I thought I could just run DNS here on my Linux box. But
>> apparently from what I understand of the reading I'm doing I'd need two
>> servers to do this.
>> Other readings I'm doing are telling me to use my ISP's DNS servers and
>> have them set up the records for me.
> I've been doing *EXACTLY* this for quite a few years.  Dan's advice will
> get you started on DNS but you should probably take things slowly.  Get
> your DNS set up and check that you can "find yourself" from outside your
> own network (e.g., go to someplace that provides public internet access
> and make sure you can connect).  Make sure your ISP allows you to run your
> own servers.  Many ISPs do not or require that you purchase a business
> account in order to do so.
> As another poster has pointed out, you are supposed to have more than one
> DNS pointing to your network.  The internet police will not swoop down on
> you if you don't but your network disappears whenever your name server is
> down.  A quick reboot isn't usually a problem but you probably ought to
> have some sort of backup available in case you have a hardware failure
> that has your DNS down for a lengthy period of time.  As an example, my
> DNS box is also the primary server for my home network so I set all of the
> drives up with Linux software RAID and then confirmed that the box still
> functions if I remove a ribbon cable from any disk.  In addition, I have
> an old PIII/733 that I typically use for testing that I can swap in if I
> have to.
> Once you have your network "live" you can start messing with sendmail.
> Make sure you disable relaying from outside your network.  Getting a basic
> configuration working isn't hard and it's really nice to be able to
> control your own e-mail.  The only problem I've run into is my ISP still
> claims my IP address on a reverse look-up so there are a very few places
> (spamhaus in particular) who won't accept e-mail from my domain.


I'm in the middle of a similar exercise - I found the DNS how-to extremely
helpful. You might want to give it a shot. I bought the o'reilly books too,
but the how-to really does cover stuff very quickly. I had always thought
dns was a minefield, but once you look at it logically for your network it
all makes sense fairly quickly. I guess I'm a month into it now from my
first stab at it. It's well worth the effort I do have to say.

Best of luck


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