subdomain delegation for email routing

[Hans Jacobsen]

It is very possible to create a subdomain,  to sub-delegate the subdomain, 
and have email delivered directly to the outside vendor.

Once you delegate, you have _no_ control or other records.  If you delegate 
the domain care.company1.com to ns.webservice.com, then ns.webservice.com 
has to have the MX entry for care.company1.com.

If company webservice.com is cooperative, subdelegation can work.  However, 
company1.com could just have an MX entry for care.company1.com pointing at 
mail.webservice.com - the entry below - without the sub-delegation.

The true nature of the problem that must be solved is not clear from your 
email.  The response time appears to be the problem.  It is unclear to me 
how changing the email path fixes that from the information given.  And who 
is it a problem for?  company1.com?  If the email does not get to 
company1.com first, then how will company1.com know how slow webservice.com 
is in forwarding the emails appropriately?

-hej
Hans Jacobsen



At 04:38 PM 9/25/2003 -0700, Alan Factor wrote:

>I have a client (company1.com) who has customers send email to several 
>special email accounts (such as customer service which goes to 
>care at company1.com). These emails are processed along with all other 
>corporate email by the corporate mail server and then forwarded to an 
>outside vendor (webservice.com) that handles these special email accounts. 
>A backup copy is made and kept by company1.com and the original is 
>forwarded to the vendor (e.g., to company1-cs at webvendor.com) and the 
>vendor responds to the email. Unfortunately average response times are 48 
>hours.
>
>My client wants to have the customer service email delivered directly to 
>the outside vendor and I suggested that they create a subdomain 
>care.company1.com and delegate this subdomain to the vendor:
>
>care.company1.com IN  NS  ns.webservice.com
>care.company1.com IN  MX  mail.webservice.com
>
>The vendor can forward email from care.company1.com to the appropriate end 
>user and then forward a backup copy to company1 (e.g., backup.company1.com) .
>
>Is this possible?
>What DNS config is required?
>Are there any pitfalls/better ways?
>
>Thanks,
>Alan
>
>--
>Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/

-hej
Hans Jacobsen
cell 408 828 3228
YM ID hejish