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Re: strange smtp blockings (MS DNS zone and bind 8 issue?)

On Sat, 14 Jul 2001 00:44:25 -0400 (EDT)
Richard A Nelson <cowboy@debian.org> wrote:

> On Fri, 13 Jul 2001, Roland Krocin wrote:
> > potato or woody?
> > I'm getting the same problems on 2 out of 3 woody boxes (sendmail). the
> > third works 70% of the time. reverse dns works perfectly to all other hosts.
> > other interesting thing is that this seems to be an issue mostly with
> > Microsoft-OS MTAs. There is a known problem with bind 9.x and MS DNS zone
> > transfers, that may have something to do with it...
> If you're having problems w/MTA -> M$ MTA  (the original poster said
> telnet 25 had the same problem, so its not MTA->MTA) - and you're on
> 8.12, you may want to disable TLS negotiation (either on a host basis,
> or altogether).

hello again,

now what I can say:

a) sure is not a MTA issue because telneting from this host to the other at port 25 also is blocked.
b) rblcheck doesnt show any blocks for my host.
c) no problem with dns config neither disk space or bandwich out of limits.
d) only some hosts blocks me to send email at them.
   the remote email servers that blocks mine are using different systems:

   220 X1 NT-ESMTP Server correo.servidoresdns.net (IMail 6.06 13762-1)
   220 mail1.telefonica.es ESMTP Service (Lotus Domino Release 5.0.5) ready at Sat, 14 Jul 2001 15:22:13 +0200

e) the only coincidence is that the remote hosts that blocks mine probably are using M$ dns server.

f) i-m running potato with kernel 2.4.4 and with bind 8.2.3-0 on that server and I-ve been moving dns zones for more than 200 domains recently from an old primary dns server with bind to this one.

g) remote admins tell me that they are not blocking my hosts and dns config are ok.

what should I do ?

Jaume Teixi
   6TEMS - Ducform, SA

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