Re: On SBS 2003 server Outlook cannot connect to external POP3 boxes
- From: "Larry Struckmeyer" <lstruckmeyer(at)mis-wizards(dot)com>
- Date: Fri, 21 Mar 2008 15:43:28 -0400
Just to enhance my understanding:
Mail normally flows via SMTP to your SBS/exchange. There are public DNS
records that will cause mail@xxxxxxxxxxxxxx to divert to another mail server
if yours is off line.
You know there is mail at that mail server, and your home computer can
connect to it via POP3 protocol whether it is in or out of your office, but
office computers that are tied to the SBS cannot.
Is that correct?
If so, can you ping the remote mail server from the SBS? From the
workstations? Can you telnet to it, from the SBS? From the workstations?
To what is the home notebook connected when it works? I am suspecting port
110 is blocked between your SBS and the inet.
workstations - switch - SBS nic1 - SBS nic2 - firewall - inet device
notebook
/
From the SBS, From a Workstation, From your notebook:
open a command prompt
type telnet mailservername 25
should respond OK
quit
type telnet mailservername 110
should respond OK.
quit
I suspect the notebook will respond in to both 25 and 110, but the
workstations only respond to 25, which means you have a block on 110
somewhere in the SBS to inet part of the loop.
--
Larry
Please post the resolution to
your issue so that all can benefit.
"Umtalipete" <Umtalipete@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:249877A5-2E53-416B-96F9-4F3272F39492@xxxxxxxxxxxxxxxx
On the SBS system I inherited here the main mail server is Exchange and
all
the users use Outlook 2003 to access with no problem. As part of disaster
recovery we have externally hosted a mirror set of mail boxes and set the
MX
record priority to send mail to the Exchange first and if not availabe to
send to the external hosting site. But when I setup the POP3 account in
the
users' Outlooks it tells me that it cannot find the mail server to send or
receive, however I have Outlook setup to access the Exchange via HTTP and
I
can add the POP3 account no problem. I brought my home notebook into the
office and connected to the local LAN and it still connected to the POP3
ok
indicating it is not the LAN router firewall that is blocking. Presumably
the
guy who set this system up placed a policy block on users setting up POP3
accounts to prevent them adding their home emails. Is this possible and
where
may he have done this? The ISA server is not installed so it is not likely
to
be that. Thanks for any help.
.
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