my exchange never receive emails sent by others

my exchange never receive emails sent by others

Post by Wen » Thu, 07 Nov 2002 23:12:16

Dear Sir/Madam:
    Recently I just upgrade our office's Exchange 5.5 to Exchange 2000.
Everything is working fine except that if someone outside of our domain send

name ),
we never received the emails.
For example, I tried to use my hotmail account to send to my account on the
new Exchange 2000

Strangely, my hotmail account never get any bounce emails nor any
nondelievery reports.
Those emails I sent through hotmail to my exchange 2000 seem all

But our remote employees located in other countries are able to use POP3 and
services on the new Exhcange 2000, they can send emails to everywhere, even
they can send

So it seems that all SMTPs (except our own Exchange2000 SMTP) cannot send
emails to our domain email accounts..

Can you help me out on this?

Some facts about our network
We host our own public DNS for our MX record.
We are behind an ISA server, and I had published secure mail server.
The DNS is on the ISA ( and I had published the DNS query and DNS zone
transfer )

Thank you very much.



1. Exchange 5.5 Sending Internet Email to Some and Not Others

Good Day Everyone,

I have an Exchange 5.5/SP4 server that creates an interesting
re-ocurring problem that happens about every 10 to 30 days. It will
not be able to send Internet email to some domains but will be able to
send to others. It does seem to be the same domains every time it
occurs. There are a total of eight domains that it can't send to when
this problem rears it's head, but can send to any other domains. The
interesting part is that I can restart the MTA and IMC and it works
again for another 10 to 30 days before it happens again. The domains
have no relevance that I can find, they are hosted by different ISPs
and are hosted in different areas of the nation. The steps I have
taken thus far have been to re-calculate the routing table, check the
GWART for corruption, reinstall SP4, and of course restart the IMC and

Any help riding myself of these "gremlins" would be greatly

Tony Painter
Systems Analyst II
Lanit Consulting Inc

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