Re: Email, SMTP & DNS configuration questions

Stu looking at your other post which Lanwench has answered I think you're
really confused about DNS entries and now ask us to simplify it for you. It
appears that you have tried to add DNS entries to your internal DNS server
and if so that won't ever work since you need them on the "outside" at
whatever entity hosts your public DNS records. So proper A and MX are needed
there in order for SMTP mail to work and have your Exchange receive the
mail. You also mentioned that your ISP had setup an MX record but did they
also setup the proper A record? I hope that is a straight and simple enough
answer for you. As Lanwench requested your actual domain name would be
helpful. If you don't want to disclose that run your domain name through
www.dnsreports.com to see if it shows errors.

"Stuart Smith" <stuartsmithz@xxxxxxx> wrote in message
news:18463FC0-FF41-4E54-B6CD-99CE17D49DEC@xxxxxxxxxxxxxxxx
Jon,

Ambiguous answers or what...

If you look at my post 3 above yours ...it is suggested by Lanwench that
you
remove anything relating to your external domain name and do not put in an
MX
at all....its really getting me confused...one person says put it in and
one
says remove it....I cannot get a straight answer and am beginning to
wonder
if anyone understands DNS enough to explain it simply.
--
Stu


"Jon Lewis" wrote:

Thanks Chris

I'll check out dynDNS.

What I was thinking though is if our server was down, the ISP would get
the
mail which I could retreive when back on line if I still have the pop3
connector set up.

In other words is it possible to have both SMTP delivery & pop3 retrieval
running together?

Alternatively is it safer in a small business to have individual email
addresses set up at the ISP and have mail pop3'd into individual
mailboxes
by the SBS server?

Many thanks



"Cris Hanna [SBS-MVP]" <crisnospamhanna@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
wrote in message news:uGLlHODQHHA.2340@xxxxxxxxxxxxxxxxxxxxxxx
You should probably look at deleting it. if you up the
priority...they've already said they don't support store and forward so
if
you're connection went down...they'd get the mail...but it would never
come to your exchange server when the connection comes up.

Consider this service as a backup
http://www.dyndns.com/services/mailhop/backupmx.html

--
Cris Hanna [SBS-MVP]
------------------------------
Please do not contact me directly, only respond in the Newsgroups
MVPs do not work for Microsoft
------------------------------
Send via Windows Mail on Vista Ultimate connected to SBS 2003 R2
"Jon Lewis" <jon.lewis@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:OMN2A9AQHHA.1756@xxxxxxxxxxxxxxxxxxxxxxx
Thanks to all who helped me with DNS questions a couple of weeks ago.
I
have some more questions please.

Our company SBS 2003R2 server retrieves our emails from a single
primary
email account (hosted by our ISP) using the pop3 connector into a
global
mailbox. The users emails e.g. user1@xxxxxxxxxxxxx are resolved into
the
users mailboxes by our server (user1@xxxxxxxxxxxxx etc. are set up as
aliases of the primary email name at the ISP).

Evidently pop3 retrieval cannot resolve bcc messages which get dumped
into our administrator mailbox as do (for reasons unknown) all
incoming
read receipts, so I want to convert to SMTP.

I have gathered that I make 2 DNS record changes:

a new A record
key: mail
value: our external IP address

a new MX record
key: @
value: mail.ourdomain.com
priority value: 10

Do I delete the existing MX record value: ibmr.ISP.com. or up the
priority to say 20 so that if our server is down then mail will be
directed to the ISP server for later pop3 retrieval (Can I still run
the
pop3 global mailbox in parallel as a back up and to retrieve any mails
addressed to the primary email account at the ISP itself?)

I'm asking this as the ISP state: "Store and Forward SMTP forwarding
on
broadband accounts is not supported. If your broadband connection is
inoperative or your router/hub/server is switched off you will not be
able to receive mail." So presumably this means that if our
connection/server is down then emails will be returned undeliverable.
Will retaining the existing MX record with a modified priority prevent
this? Is there a best practise?

Also there is an existing CName record
key: mail
value: mail.ISP.com

Do I need this or should I modify or delete it?

Many thanks











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