using DNS Hinfo to forward emails per email account

[Riazati, Roy K.]

Hi Jim, Thanks for the reply,  I understand the HINFO record as it is
described in RFC document and not being used commonly any more, but I know
for fact that at&t used HINFO IN <> and HINFO OUT <> records for redirecting
mail going to their email server mailboxes to different servers at different
domains.

I am using MS exchange as mail server, and even though it allows that
redirection but it does not allow it to be done at server (centralized
location), that is why I was trying to see if some one had seen that type of
configuration using the DNS server.
Thanks again,

> -----Original Message-----
> From:	Jim Reid [SMTP:jim at mpn.cp.philips.com]
> Sent:	Tuesday, September 21, 1999 12:22 PM
> To:	Roy
> Cc:	comp-protocols-dns-bind at uunet.uu.net
> Subject:	Re: using DNS Hinfo to forward emails per email account 
> 
> >>>>> "Roy" == Roy  <Roy.Riazati at piamerch.com> writes:
> 
>     Roy> I am going to move my email accounts on my mail server to
>     Roy> another server in different domain in phases.  That is,
>     Roy> userA at domain1.com is going to be removed from this server and
>     Roy> moved to a server in domainB.com.  I want the DNS forward any
>     Roy> messages that is addressed to userA at domain1.com to a
>     Roy> host(mail server) in domainB.com.
> 
> This is not a DNS issue. It's a mail routing issue. Name servers don't
> (can't) forward mail.
> 
>     Roy> I have seen AT&T doing this by using the HINFO record long
>     Roy> time ago and I need any help about how to use either HINFO
>     Roy> record to do this task, or any other method that you
>     Roy> personally have experienced with.
> 
> The HINFO record is obsolete. I'm mystified how anyone could use this
> to route mail. All HINFO records contained were two strings: one for
> the hardware platform and one for the OS version.
> 
> What you need to do is play with the mail software on the mailhub that
> gets all the mail sent to domain1.com. [In DNS terms there will be an
> MX record for domain1.com which points at some SMTP server.] When mail
> arrives as that mail server it has three choices. It could bounce the
> mail "unknown user"; it could deliver it to a local mailbox; or it
> could forward the message to some other mail system. For the last two
> options there is usually an alias table or something like that which
> determines what happens. So when mail for user1 at domain1.com arrives,
> the mail system looks up user1 in that alias table and puts the mail
> into user1's mailbox. Mail for user2 at domain1.com is to be sent to
> user3 at domainB.com, so your mail system munges the headers and then
> forwards the mail to the mail server for domainB.com.
> 
> If you need more information, go ask the people in comp.lang.sendmail.