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Re: (OT) ISP's that don't allow relaying
On Sun, 16 Dec 2001 15:46:05 +0200, Nadav Har'El <nyh@math.technion.ac.il> wrote:
>
> As for the question the original poster had: when you log in, you have an
> ISP, so use its SMTP server as your mail relay. For example, say you log
> in using Barak. Then use mail.barak.net.il as your mail relay. It's not
> rocket science!! And please don't listen to the people who are telling you
> to run an SMTP server on your own personal computer. This solution is wrong
> on so many levels (spam reduction is only one of them)...
I don't agree with you here. When we connected our systems to the
Internet I used our ISP (Internet Zahav) mail relay for sending mail.
After sometime (when more users were connected to the ISP) some of my
mails were blocked because of their origin (Internet Zahav mail).
I changed my sendmail configuration NOT to use relay (actually, only
2 systems here which have their incoming port 25 open on the firewall
are connected directly, the other 10 are relaying through one of them).
I configured the sendmail of a friend's machine (Linux, ADSL, no fixed
IP, he is using NO-IP dynamic DNS) to work on it's own (no relaying)
and it works fine.
My advice is: if your computer is connected almost all the time, you
don't need relay and you better off without it.
I think that the reported problem of not being able to post from
"dial-up" connection has to do with lacking of reverse DNS (i.e. the
IP used has no name assigned to it). This is a problem with some of
the ISPs (e.g. Kavey-Zahav) and not others (e.g. Netvision) which
assign names to all their IPs.
Ehud.
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