Re: Default SMTP Virtual Server - no outbound mail

- Assuming you tried to telnet from your Exchange server to a smtp host
outside your firewall.
- Did you try this by IP address of the external host?
- If that fails as well, check if outbound smtp (tcp port 25) is
open/allowed on your firewall (from Exchange or internal network to external
network).

- If you just checked by fqdn of remote smtp host and this didn't work, test
this by IP address.
- If that works, and it's now isolated to name resolution (you cannot
resolve internet domains from your Exchange server). Remove the external DNS
server(s) from SMTP virtual server config.
- Can your internal DNS server(s) resolve internet domains? If yes, you do
not need external DNS server(s) configured on your SMTP virtual server.
- If the internal DNS servers cannot resolve internet domains, talk to
whoever takes care of your network connectivity/dns and get IP address(es)
of valid DNS servers in your perimeter network ("dmz") or located at your
service provider and insert these in your SMTP vs config.

--
Bharat Suneja
MVP - Exchange
www.zenprise.com
NEW blog location:
www.exchangepedia.com/blog
----------------------------------------------


"cchcc" <cchcc@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:449C9B54-68EF-4835-B8C4-E3B57B40BBC4@xxxxxxxxxxxxxxxx
Telnet to port 25 is unsuccessful, connection failed, timed out.
something
in exchange or firewall? was working until i changed the external dns
servers! any way to find out what the old entries were? A readable
config
file I could view from backup?

I'm stuck with swelling queues!

"Bharat Suneja [MVP]" wrote:

telnet to smtp port:
telnet server.domain.com 25
or by ip address:
telnet x.x..x.x 25

before that, make sure name resolution works:
nslookup -querytype=mx somedomain.com

this should give you a list of external smtp hosts to work with.
--
Bharat Suneja
MVP - Exchange
www.zenprise.com
NEW blog location:
www.exchangepedia.com/blog
----------------------------------------------



"cchcc" <cchcc@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:D67B7CAF-B035-4BE4-92A7-4B80682924B4@xxxxxxxxxxxxxxxx
outside domain pings are successful, how would i test smtp?

Anything to do with propagation? do I need any default servers in
there?

"Bharat Suneja [MVP]" wrote:

- Test name resolution from Exchange server to internet domains
- Test smtp connectivity to internet (smtp) hosts
- Check event logs - is anything loggged?

--
Bharat Suneja
MVP - Exchange
www.zenprise.com
NEW blog location:
www.exchangepedia.com/blog
----------------------------------------------



"cchcc" <cchcc@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:B23FE0E9-CB2A-43D1-85D4-5BC93A2E9531@xxxxxxxxxxxxxxxx
Good day -I'm running Exchange 2003 SP2 and I recently changed the
external
DNS servers in the SMTP protocol properties, (System Manager> Admin
Group
>
First Admin Group > Servers > Default SMTP Virtual Server >
Properties
>
Delivery > Advacnced) and now all outbound mail is stalled. The
queue
is
full of "Retry" for all external domains.

Inbound mail is fine. I failed to record the existing external DNS
servers
because I didn't think it was necessary. The external DNS servers I
entered
are from my ISP where the MX/A/PTR records exist.

Can you assist? Much appreciated.








.

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