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CNAME point subdomain to another domain

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linux-howto

http://serverfault.com – I know this has been asked before in various forms, but I've tried all the suggestions and had no luck (or maybe skills). I am trying to point a subdomain (mail.abcd.com) to Rackspace's hosted Webmail service for a client. My understanding is I should be able to set up cname for the subdomain and point it to rackspace's hostname: apps.rackspace.com I have set up the following cnames: www.mail IN CNAME apps.rackspace.com autodiscover IN CNAME autodiscover.emailsrvr.com mail IN CNAME apps.rackspace.com I have tried doing dig mail.abcd.com and nslo (HowTos)