I have installed Ubuntu Hardy Server with ISPConfig using the Perfect server guide. I have everything working perfectly except that I cannot access pop3 with any mail client, including Thunderbird. I have scoured the forum and tried all suggestions with no success. If I don't check the box for Server Settings->Security Settings->Use secure authentication I get: Sending of password did not succeed. Mail server mail.domainname.com responded: Login failed. And my syslog says: pop3d: LOGIN FAILED user=myname If I do check the box for Use secure authentication I get: Mail server does not support secure authentication. saslauthd and /etc/init.d/courier-pop are both running. Help!!!!