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How do we access mails from outlook through squid proxy server.

Posted on 2004-08-27
Last Modified: 2010-08-05
Hi Experts

We have  squid proxy server (squid-2.5.STABLE1-7.1.91mdk). Our mail server is running remotely & maintened by ISP. We are used pop3 & smtp adresses to access mails. But  we are not able to access (send/recieve) mails from microsoft outlook express through squid proxy server. But IE is working fine, with squid. If you have any answer regarding this please help me out.

Thanking you,


Question by:ramanagouda
  • 4
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LVL 36

Expert Comment

ID: 11911686
Hi ramanagouda,
Squid is only a proxy for web and ftp. When you use IE you are using Squid as a proxy server to the webmail interface.
When you use Outlook you are connecting directly so you cannot use Squid. You will need to permit outgoing smtp and pop3 to the mail server in your firewall configuration.

Author Comment

ID: 11912874
Hello grblades

I know squid is web & ftp proxy. But i wanted know how to permit outgoing smtp & pop3 in firewall & Microsoft outlook configuration also.
LVL 36

Expert Comment

ID: 11912933
What firewall are you using?
Is it just simple iptables or is the firewall a different machine?
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Author Comment

ID: 11919397
We are using just simple iptables
LVL 36

Expert Comment

ID: 11920084
Can you post your current iptables configuration. On RedHat this is a text file located at /etc/sysconfig/iptables.
I'll then tell you what to change.

Author Comment

ID: 11928865
Our iptables configuration as follows

# Generated by iptables-save v1.2.7a on Tue May 18 17:53:00 2004
# Completed on Tue May 18 17:53:00 2004
# Generated by iptables-save v1.2.7a on Tue May 18 17:53:00 2004
:INPUT ACCEPT [54:5044]
:OUTPUT ACCEPT [53:4966]
# Completed on Tue May 18 17:53:00 2004
# Generated by iptables-save v1.2.7a on Tue May 18 17:53:00 2004
# Completed on Tue May 18 17:53:00 2004se
LVL 36

Accepted Solution

grblades earned 125 total points
ID: 11929432
It looks like your firewall settings are empty. I guess you have routing turned off and this is why access through Squid is the only access you have.

You will need to do the following :-
1) Enable routing
2) Configure the firewall to perform NAT (Network Address Translation)
3) Configure the firewall to only permit outbound POP3 and SMTP connections.

I suggest you post a pointer question in the Linux area to ask someone there to help you out with this.
I have done it a couple of times myself but I don't have access to a machine configured this way in order to give you a quick guide.

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