Dear all,

Our redhat 9 server runs smoothly¡M However, recently, the outlook express
cannot connect to such server to receive email, Anyway, when I test the pop
server by using telnet "192.168.0.11 110"
the server can give

[root [at] ns etc]# telnet 192.168.0.10 110
Trying 192.168.0.10...
Connected to ns.xx-xx.com (192.168.0.10).
Escape character is '^]'.
Connection closed by foreign host.

It seems not to refuse the request but close the connection immediately.

Why? Please give me helping hand, thanks.

Regards,
Simon

On Sep 11, 12:09 pm, "John" <John... [at] yahoo.com> wrote:
> Dear all,
>
> Our redhat 9 server runs smoothly=A1M However, recently, the outlook expr=
ess
> cannot connect to such server to receive email, Anyway, when I test the p=
op
> server by using telnet "192.168.0.11 110"
> the server can give
>
> [root [at] ns etc]# telnet 192.168.0.10 110
> Trying 192.168.0.10...
> Connected to ns.xx-xx.com (192.168.0.10).
> Escape character is '^]'.
> Connection closed by foreign host.
>
> It seems not to refuse the request but close the connection immediately.
>
> Why? Please give me helping hand, thanks.
>
> Regards,
> Simon

Their could be lot of reasons, what mail server are you using?

Dear all,

Our redhat 9 server runs smoothly¡M However, recently, the outlook express
cannot connect to such server to receive email, Anyway, when I test the pop
server by using telnet "192.168.0.11 110" the server can give

[root [at] ns etc]# telnet 192.168.0.10 110
Trying 192.168.0.10...
Connected to ns.xx-xx.com (192.168.0.10).
Escape character is '^]'.
Connection closed by foreign host.

It seems not to refuse the request but close the connection immediately.

[root [at] ns etc]# netstat -lt|grep pop
tcp 0 0 *:pop3s *:* LISTEN
tcp 0 0 *:pop2 *:* LISTEN
tcp 0 0 *:pop3 *:* LISTEN

Why? Please give me helping hand, thanks.

Regards,
Simon

>
>

John schrieb:
> Dear all,
>
> Our redhat 9 server runs smoothly=A1M However, recently, the outlook e=
xpress
> cannot connect to such server to receive email, Anyway, when I test th=
e pop
> server by using telnet "192.168.0.11 110" the server can give
>
> [root [at] ns etc]# telnet 192.168.0.10 110
> Trying 192.168.0.10...
> Connected to ns.xx-xx.com (192.168.0.10).
> Escape character is '^]'.
> Connection closed by foreign host.
>
> It seems not to refuse the request but close the connection immediatel=
y.
>
> [root [at] ns etc]# netstat -lt|grep pop
> tcp 0 0 *:pop3s *:* LIS=
TEN
> tcp 0 0 *:pop2 *:* LIS=
TEN
> tcp 0 0 *:pop3 *:* LIS=
TEN
>
> Why? Please give me helping hand, thanks.

Difficult if you give so precious little information about your setup.
But in general terms:
- Check the network connection between the client and server.
- In particular check if there are any firewalls/filters active between
or on either of them.
- Check the log of your POP3 server software (whatever it is) for any
traces of your connection attempts and reasons for rejection.
- Run netstat with the -p option to see if the process listening on the
POP3 port is the one you think it is.
- As the problem started recently, find out what (was) changed between
the last time it worked correctly and the first time it didn't work
anymore.
HTH
T.

--
Please excuse my bad English/German/French/Greek/Cantonese/Klingon/...

On Tue, 11 Sep 2007 15:31:27 +0800, John wrote:

> Our redhat 9 server runs smoothly¡M

RHL-9 was EOL'd years ago and no updates are now available. Install an
OS which is currently supported. If you do not wish to pay Red Hat their
license fee for RHEL then consider using CentOS which is almost identical
to the Red Hat product.

> [root [at] ns etc]# telnet 192.168.0.10 110 Trying 192.168.0.10...
> Connected to ns.xx-xx.com (192.168.0.10). Escape character is '^]'.
> Connection closed by foreign host.

The default installation of RHL provides a firewall (iptables) which
blocks incoming port 110. Edit your iptables rules file to permit access
to port 110 and execute /etc/init.d/iptables restart.

In comp.mail.imap John <Johnlee [at] yahoo.com> wrote:
> [root [at] ns etc]# telnet 192.168.0.10 110
> Trying 192.168.0.10...
> Connected to ns.xx-xx.com (192.168.0.10).
> Escape character is '^]'.
> Connection closed by foreign host.

> It seems not to refuse the request but close the connection immediately.

A common reason for such behaviour is TCP wrappers. Whappers. Have you
changed your hosts.allow or hosts.deny?

/NIels

--
Niels Baggesen -- [at] home -- Århus -- Denmark -- niels [at] baggesen.net
The purpose of computing is insight, not numbers -- R W Hamming