[IMail Forum] Bizarre problem with WebMail + DNS + W2k

[Sergio Rinc�n Jaramillo]

Hi there:   Well, after a full week reinstalling and reinstalling and looking up for some help, we found the following strange thing with our system.   We do a clean installation of webmail on our server (IBM Xserier 235, 2 Xeon x 3.2 Ghz, 2GB RAM), with Windows 2000 Server, MS DNS Server, Fprot, Declude AV, Declude Hijack.   The server is the Primary DNS Server of our Network.   The Imail server, responds to hostname (geo.net.co)   (geo.net.co) is configured as a Primary zone in our DNS. (Remember that the DNS server runs on the SAME Imail Server).   geo.net.co has the following created records (I  think this is not ok, so if you see some missleading, thanks!, )   ; ;  Database file geo.net.co.dns for geo.net.co zone. ;      Zone version:  2001042332 ; @                       IN  SOA ns1.geo.net.co.  hostmaster.geo.net.co. (                          2001042332   ; serial number                          3600         ; refresh                          3600         ; retry                          86400        ; expire                          86400      ) ; minimum TTL   ;  Zone NS records @                       NS dns1.geo.net.co. @                       NS ns1.geo.net.co. @                       NS ns2.geo.net.co. @                       NS imail.noc-geonet.com. @                       NS dns2.geo.net.co.   ;  Zone records @                       A 200.124.168.11 @                       MX 10 ns1.geo.net.co. dns1                    A 200.124.168.11 dns2                    A 200.124.168.11 ns1                     A 200.124.168.11 ns2                     A 200.124.168.12 smtp                    CNAME dns1.geonetsa.com. pop3                    CNAME dns1.geonetsa.com.     So, at this server, i have like 200 Virtual domains, i make an CNAME record at each one, pointing at geo.net.co so when they log in to the webmail, they dont have to use @domain.com appended to the username.     The strange thing is:   When i use http://200.124.168.11:8383 for logging in to my Webmail, using the perfmon i see that iwebmsg only uses like 10% of the cpu for the complete logon process, but if i use for example http://mail.domain.com:8383, the cpu goes nuts, like 90-100% of ussage for like 3 seconds that is the time of the complete logon process.   So, the only way that the cpu, doesnt hang is if I use: http://200.124.168.11:8383  or http://geo.net.co:8383       Any ideas???         Sergio Rinc�n Jaramillo    Ingeniero Telem�tica GeoNet S.A.    TEL (574) 5104701 Fax (574) 2350160 L�nea �nica de Atenci�n al Cliente 3500111 Calle 34B N� 66� 42, Medell�n, Colombia   Ya visit� nuestro sitio www.geo.net.co   Las opiniones que se expresan en este e-mail son personales y no necesariamente coinciden con las de GeoNet S.A. Este e-mail y todos los archivos transmitidos en �l, incluidas las respuestas y los reenv�os (que pueden incluir modificaciones) son confidenciales y de uso exclusivo del destinatario original, no se debe revelar ni utilizar por una persona distinta al destinatario ni copiar por medio alguno.