Could not connect to webmail?

Hi i have installed rcmail and horde and SquirrelMail but when i tried to connect to webmail http://mydomain.com/webmail its always prompting this error "Could not connect to server"
I have checked exim is running and httpd is running and all necessary services are running but still it's not working.

What is the issue?

I can pop the mails using kmail or other mail client.I can pop the mails from my outlook but cannot using my webmail client.What could be the issue?

Have you installed IMAP as well as have you checked the firewall ?
Paste the logs ....

Thanks for your quick reply .. let me check first imap service and iptables ..

For webmail default port is 2095, check if its blocked or open in firewall..try accessing via yourdomain.com:2095