Carlos E. R. wrote:
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The Tuesday 2006-12-19 at 16:34 +0100, Sandy Drobic wrote:
The correct way to handle this would be to tell the admin of the ip address
space to set the correct ptr record. If that is not possible and the line
already has a static ip, look for an alternate provider.
I have been told that is an almost impossible task at some places
(countries). We can easily get a domain name, but we can not change the
reverse name: it is defined by the provider to his liking (read: less
work). Some providers here do not even have rDNS on!
Such a provider is almost useless for someone who wishes to set up his own
mailserver. I have some chinese contacts that are inflicted with such a
provider. It doesn't change the fact that such a setup is seriously
cramped for a mailserver.
If you want to set up your own mailserver, you first have to decide how
serious you are. Thanks to all the spam, phishing and viruses many
mailserver admins are applying harsh checks before they accept mails. The
old days where being an open relay meant you were part of the community
sadly have gone the way of the dinosaurs.
So you need to set up the server with correct dns name for the ip and
matching reverse dns pointer. If you can't get that you will run into trouble.
Only if the above is not possible you could set the smtp_helo_name to your
current reverse dns name.
How about setting myhostname? Mmm, it would affect receiving mail, I
suppose... And having both names, the one provided by isp, and the
contracted DNS name? I'm afraid I'm not too clear O:-)
The default for $smtp_helo_name is already $myhostname. That's were some
of the "localhost.localdomain" come from. So your instinct is right on
target. (^-^)
If you are working on a dynamic line you should consider to either
upgrade to a static ip or at least to use a relayhost with a static ip.
Do you know that many providers in my country reject relaying mail if the
from address is not in their domain, even for clients in their network?
Which country is that, spain? I have heard many stories about British
Telecom believing that no reverse dns settings are neccessary for clients.
Well, if you have the choice you just take your business to another ISP.
If you don't have a choice, you make do with what you have.
Sandy
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