On Tue, 11 Apr 2007, Christer Weinigel wrote:

quoted text
> Linus Torvalds <torvalds@linux-foundation.org> writes:
>
>> It's also possible to just not accept mail if the reverse lookup indicates
>> that the sending IP address is a dynamic address, which you can sometimes
>> see from the hostname. I would suggest you *not* name your hosts to
>> contain a lot of numbers and the string "dhcp", for example ;)
>
> That would be a very bad idea I think.  Doing that would lose quite a
> lot of small companies and individuals such as me that run a mail
> server but are unable to get the ISP to change the reverse DNS.  For
> example I do have a fixed IP, but have an reverse DNS pointer which
> looks like 1-2-3-4-5a.foo.bar.bostream.se.

I am in the same situation.  I also have three domains.  Which one do I 
pick?  I can't afford to get an individual ip address for each.  Virtual 
servers on a single ip also will have similar problems.

quoted text
> Forcing everybody to send mail through their ISP (and I'm not even
> sure if my ADSL subscription includes such a service) would be a big
> loss.  First of all its a philosophical thing, I think that it's very
> important that small shops or individuals should be able to control
> the services they need, the internet is supposed to be peer to peer.
> Second because the ISP's mess up a lot more often than I do, for
> example Telia, one of the largest ISPs in Sweden have been having
> massive mail server problems during the last week which I'm happily
> unaffected by.

My ISP only reciently started to think about using greylisting.  They 
route all their mail through a filter service that I do not trust.  (Too 
many false positives.  I also expect that all this talk about "forking 
children" would get me on some list somewhere.)

I have more experience running mail servers than the people at my ISP. 
(Not their fault.  They are young.)

-- 
"Invoking the supernatural can explain anything, and hence explains nothing."
                   - University of Utah bioengineering professor Gregory Clark
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