Re: MX & A Records for Dual Domain Smtp Host

Relay is for outgoing mail and doesn't require an MX record. MX is for
incoming mail only.

MX records basically say "when sending email to this domain, send it to the
following servers..."
Relay is like passing a baton in a track race. The mail server relays your
outgoing email to another mail server.

Here is a good article I found that discusses where to look in your config
for mail relay settings:
http://www.relevanttechnologies.com/secex_120803.asp You want to check SMTP
settings.

-Greg

"Masitpro_mcse" <Masitpromcse@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:2A070A60-75DD-44C7-B6B4-90AB58DC2B36@xxxxxxxxxxxxxxxx
Need to have the new domain & old domain to co-exist on one exchange
server
5.5 (ip addr= 10.0.100.5); but the mail server is rejecting mail from old
domain getting 550 Relaying is Prohibited when I telnet -mail server
config
problem or not? IMS connector is configured to accept both domains -MX & A
records needed?
--
Mark Anthony MCSE 2003


"Greg Lindsay [MSFT]" wrote:

Mark,

If I understand this correctly, you are changing from:

olddomain.com IN A 10.0.100.5
olddomain.com IN MX 10 mail.olddomain.com
mail.olddomain.com IN A 65.219.171.135

to:

newdomain.com IN A 10.0.100.5
newdomain.com IN MX 10 mail.newdomain.com
mail.newdomain.com IN A 10.0.100.5

Is this correct?

What emails are being rejected? Also, what is the PTR record for
10.0.100.5?

From the config below, it looks like you have mail.olddomain.com
configured
as a mail exchanger for the sub-domain: mail.newdomain.com. Is this what
you want?

--
Greg Lindsay [MSFT]

Disclaimer: This posting is provided "AS IS" with no warranties, and
confers
no rights.

"Masitpro_mcse" <Masitpromcse@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:C64F4E4D-4548-44CD-BCAD-1DD6272A97F6@xxxxxxxxxxxxxxxx
Having trouble with dual smtp domain records; only the new host domain
can
use email while existing host email is rejected from new domain; here
are
the
records listed in new domain: (BTW, running on NT4 server)
newdomain.com-
newdomain.com MX [10] mail.newdomain.com
mail A 10.0.100.5
mail MX [10] mail.olddomain.com
mail A 65.219.171.135 (external
mail.olddomain.com address)

BTW- newdomain & oldomain share the same internal ip of 10.0.100.5

This is the last thorn on my side to complete this changeover...thx



--
Mark Anthony MCSE 2003





.

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