Re: Some emails not reaching our server
From: Kirill S. Palagin (kpalagin_at_nomail.phxint.please.ru)
Date: 04/11/04
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Date: Sun, 11 Apr 2004 11:37:08 -0400
Tracert is using ICMP to test connectivity, and some hosts just have
blocked response to ICMP (ping) requests, so you may get failures even
if connectivity is OK. Give us specifics (send name of your domain to my
e-mail address, if you are uncomfortable with posting it here) so that
we can try different tests directly (not involving you and somebody else
at remote location). Also take a look at this article
http://support.microsoft.com/default.aspx?scid=kb;en-us;159211
Davem wrote:
> Hello All,
>
> I have an issue that seems to have stumped everyone I have tried to explain
> it to.
>
> We have a SBS2000 server running exchange for our mail server. For the most
> part the server works fine. All the users can send and recieve mail with no
> problems.
>
> The problem is we have about 8-10 customers (that we know of) who can send
> an email, to any address here, and it just disappears. It does not bounce
> back and it never reaches our server.
>
> Here is what I have done to test this issue:
>
> 1) first I ran a bunch of tracert's from a number of different servers. I
> have found for the most part the tracert's reach us. But I have also found
> 6 servers that never reach us and they all stop on the same hop. I think
> this is a clue but most people don't.
>
> 2) Working with my ISP we have found one of thier servers that they can send
> mail with that does not reach us and it does not bounce back. DNS lookups
> from that server come back with the correct DNS information. Tracert does
> not reach us. BUT they can telnet to our server from theirs.
>
> 3) I have changed IP addresses for our server hoping that if it was a bad
> hop it would be rerouted. This did not fix it.
>
> I am at whits-end over this. We have been trying to resolve this for a few
> months now and no luck.
>
> Has anyone seen this issue before? Any ideas and what to try next?
>
> Thanks,
> Davem
> Gig Harbor, WA
>
>
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