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

[Dan Barker]

Several things come to mind. a) No Firewall? Sounds risky. b) You don't show any examples of the other DNS entries. You stopped just when it was about to get interesting. c) If there's not a webserver on this do-everything box, you can put IMail on port 80 and simplify everybodies life. d) Your zone serial number should be in the form yyyymmddxx, looks like the 4 got dropped. e) CNAMES cost extra references. Unless there is a good administrative reason for using them (like you don't control both the name and alias), you should just use A records. f) No SPF text seen. (A simple TXT record of "v=spf1 +mx -all" will do. g) Use http://www.dnsreport.com/tools/dnsreport.ch?domain=geo.net.co. Ignore the first error. It's not applicable in Columbia. h) How do you get IMail to notice the Host headers? I'd like to do that. I make my users type the whole thing! I thought you had to use separat IPs but that would be A records, no CNAMEs.   Dan -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]On Behalf Of Sergio Rinc�n Jaramillo Sent: Thursday, October 14, 2004 6:13 PM To: [EMAIL PROTECTED] Subject: [IMail Forum] Bizarre problem with WebMail + DNS + W2k 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.