Exchange hosting more than one domain

[YMan]

Hi,

I have a question about hosting message for more than one domain.

Let's say our company is using the domain is mydomain.com. Thus users will
have email address as (e-mail address removed), and using the same for logging in
via OWA.

Recently some users need to have a second email address as
(e-mail address removed), but would like to receive email address in the same
mailbox as (e-mail address removed).

I have set up nextdomain.com in our DNS (SOA, NS, MX, A records) as a
primary zone. Also I have added SMTP email address in the existing users who
like to have the email address @nextdomain.com in the users' properties
(under Email Address in Active Directory Users and Computers). However this
doesn't seem to work when I tried to send email in from my yahoo.com mail
account. A colleague of mine also try from others, such as gmail and
hotmail.

Would any of you know how this can be set up?

Thanks,

 

[not_active2004]

Hi there,

How is mail being sent to this new domain - is it a SMTP from an ISP or
is it for internal use only.

To have email addresses for two different domains on the same Exchange
server I believe you can add it (and activate it) as a recipient policy
in Exchange System Manager.

I have done this before for a client and it worked fine for them.

 

[YMan]

Forwarding to the correct group.

 

[Leif Pedersen [MVP]]

Hi,

Look at the recipient policy: http://www.msexchange.org/tutorials/MF010.html

Leif

 

[YMan]

I have tried adding the recipient policy for the domain @nextdomain.com.
However when I tried to send email to (e-mail address removed) the message
bounced back with the error message :

Remote host said: 553 sorry, that domain isn't in my list of allowed
rcpthosts (#5.7.1)

Is there anything that I missed? Would it be different if we have using
Exchange 2003 rather than Exchange 2000? Coz we have more than one Exchange
servers, with which those who host mailstores are on Exchange 2000. The one
being treated as an SMTP gateway is on Exchange 2003 (which the SMTP smart
hosts are all pointed to this SMTP gateway).

Thx

 

[Leif Pedersen [MVP]]

Hi,

I have never seen that NDR from an exchange server.

You don't have something else (SMTP scanners or??) between the exchange
servers and the internet?
Have you tried to send an email to the new domain from the inside?

The procedure for hosting multiple SMTP domains are the same for exchange
2000 and 2003.

Leif

 

[YMan]

The only thing between our Exchange server and internet is our firewall. Our
firewall does have email scanning (virus scanning, Spam filtering etc). The
NDR is what I got from sending via email at yahoo.com.

I have also tried what you have suggested, sending to the SMTP address
(e-mail address removed) from within our LAN. The result was good that I can
receive what I've sent.

Would it be something I have misconfigured with DNS? Or there is something
else I need to configure within Exchange? Let me refresh what I've done so
far, in the list below:

1. add a primary zone in our external DNS, with SOA, NS, MX and A record for
the domain nextdomain.com
2. also do the same in our internal DNS (which is located on the domain
controller)
3. Add email address (e-mail address removed) in the email address property of
the user's account in our domain mydomain.com for (e-mail address removed)
4. add a recipient policy for nextdomain.com in Exchange System Manager

The only thing I can think of is whether a SMTP virtual server needs to be
added. Also is there anything needs to be set in the existing SMTP virtual
server, such as relay restriction?

Sorry for lengthy post. Thx.

 

[Leif Pedersen [MVP]]

Hi,

If you can send emails to the new domain from your LAN the exchange server
is configured properly.

Try to telnet (port 25) to the new domain from the internet and see which
server answers.

Leif
PS. No need to add MX records etc in your internal DNS.
PSS. No need to add another SMTP virtual server