Re: outbound mail
From: Ben Winzenz [Exchange MVP] (ben_winzenz_at_NOSPAMdotmessageonedotcom)
Date: 02/16/05
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Date: Wed, 16 Feb 2005 08:14:32 -0600
So what happened when you ran the nslookup command against one of the
domains that fails? Was it able to return a response? How are your
internal DNS servers set up? Is the SMTP Virtual Server set to use any
other DNS servers? If so, I usually recommend to leave the DNS servers
blank on the SMTP VS, and let Windows perform DNS queries (it's more
efficient). If there are no DNS servers specified in the SMTP VS, then are
your internal DNS servers set up to use Forwarders (your ISP's DNS servers),
or are they configured to use Root Hints?
Can you post one of the domains that you are having problems sending to?
That way, we can test from here as well to see if the problem may be on
their end.
As far as making sure port 25 is open, typically that shouldn't be a concern
for outbound. Most firewalls and routers restrict inbound traffic, not
outbound. Try some other remote mail servers (telnet on port 25) and post
the results.
-- Ben Winzenz Exchange MVP "bill" <bill@discussions.microsoft.com> wrote in message news:ACDAC7D9-7478-4442-A759-BC970B566E39@microsoft.com... > thanks for the repons. > > telnet to mailb.microsoft.com on port 25 failed. telnet to my mail server > on > 25 also failed. > > message ques are retrying however the actual messages inside the que do > not > chage from queued status. > > I have checked the router and port 25 is definatly open. > > help?? > > "Ben Winzenz [Exchange MVP]" wrote: > >> As Brian mentioned, when outbound e-mail is not working, the most likely >> culprit is DNS. >> >> Take one of the domains that is not working and run an nslookup (from the >> Exchagne server) to see if you can resolve the domain to an IP. Similar >> to >> the following. Next, attempt to telnet to the remote domain host on port >> 25 >> (telnet mailb.microsoft.com 25). Do you see the welcome banner? Also, >> if >> you view the properties of the queue, what does it show you for the >> status? >> Or rather, when you find messages for that domain, what is listed in the >> properties of the message? It should show you that it is in a retry >> state, >> but it should also tell you what the result was for the last attempt >> (i.e. >> remote host did not respond, etc.) >> >> C:\WINDOWS\SYSTEM32>nslookup >> >> > set type=mx >> > microsoft.com >> >> Non-authoritative answer: >> microsoft.com MX preference = 10, mail exchanger = mailb.microsoft.com >> microsoft.com MX preference = 10, mail exchanger = mailc.microsoft.com >> microsoft.com MX preference = 10, mail exchanger = maila.microsoft.com >> >> mailb.microsoft.com internet address = 207.46.121.51 >> mailb.microsoft.com internet address = 131.107.3.123 >> mailc.microsoft.com internet address = 207.46.121.53 >> mailc.microsoft.com internet address = 207.46.121.52 >> maila.microsoft.com internet address = 131.107.3.124 >> maila.microsoft.com internet address = 131.107.3.125 >> >> >> -- >> Ben Winzenz >> Exchange MVP >> >> >> "bill" <bill@discussions.microsoft.com> wrote in message >> news:F8EB7C39-179B-4462-A1FB-A166E32AD1B1@microsoft.com... >> > Outbound mail from our exchange 2003 server is staying in the que. >> > although >> > exchange is constatly retrying connections they do not send?? >> > >> > any ideas as the messages keep growing. >> > >> > thanks, >> > >> > Bill >> >> >>
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