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Setting up SBS 2008 without an internet domain name

Hello

We do not use our current SBS 2000 box to host any websites. Infact we do that on a linux box hosted remotely. This linux box also acts as an email gateway for our domains.

We do use Exchange internally for local mail, and then have previously used the SBS SMTP connector to send mail or through the linux SMTP server if we had a problematic ISP we were mailing that was failing because of the missing PTR record (from an internet DNS point of view nothing points from our domains to our SBS box). We then used the POP3 connector to fetch mail from the linux box to our SBS box.

I want to replicate this, but have never touched SBS 2008, and will be setting it up shortly. Can this sort of setup still work ? Would I be right in saying that this sort of SMTP setup is the SMTP Smarthost which I should be able to configure through the wizards ?

Is there anything that we are forgoing by implementing this sort of setup ? other than having to access the server for remote workplace etc. by IP rather than domain name ?

Thank you
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BahBah52
Asked:
BahBah52
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suppsawsCommented:
yes, that would be the smarthost indeed, and that is also possible to do with sbs 2008, but why make it so difficult?
just setup sbs 2008 for exchange, create a ptr record at your isp, mx and a-record with the dns owner of your domainname, thats it. No need to use a smarthost.
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BahBah52Author Commented:
The reason for maintaining the linux box for mail is because we use multiple domains for our mail, and I was under the impression that SBS really only likes you using one domain name. Is this not the case ? are you suggesting to not use the linux box at all for mail ?

We have 3 domains. 1 services 10 users, 1 services 6 users, and the last services the remaining 4.
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suppsawsCommented:
no that is not he case, I am using four at the moment :-)
So, don't use the linux box for mail, it's not needed.
this will help you:
http://sbs.seandaniel.com/2008/10/hosting-multiple-domains-on-sbs.html
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suppsawsCommented:
the only thing that is important on an sbs domain is that there can be only ONE SBS server.
there can be multiple domain controllers, but SBS needs to hold the 5 FSMO roles.
You are totally free regarding email domains.
btw, some more info on sbs 2008 can be found here:
http://sbs.editme.com/sbs2008
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BahBah52Author Commented:
suppsaws,

Thank you for your replies. So presumably having taken the steps in that link you posted (thanks for that), do you happen to have a link to setting up the users with multiple domains ?

So, following what you have said, I could point the MX record to the SBS box, and leave the A records on the linux box for the websites ?
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BahBah52Author Commented:
If my last comment wasn't clear enough, can users still send as their individual domains or do they HAVE to send by the default domain name ?

Thanks
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suppsawsCommented:
no, they can send with whatever default domain they want.
If you create the multiple email domain, they will all have, for exapmle, 4 domains in their exchange properties.
Then you need to set the one you want as 'default', and uncheck 'use default email policy' or smth like that in the users 'email addresses' properties.

so for the domains you need an a-record: mail.domainA.com that points to your external ip and an mx record aslo off course.
The same for the other domains.
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BahBah52Author Commented:
Lastly, (and again thanks for your input) the PTR record ...

The DNS for our websites is hosted by the company that hosts our linux box. Should it be them that creates the PTR record ? or the people that supply our internet access ? In addition, I take it the PTR record should point to mail.mydomain.com ?

Thanks again
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suppsawsCommented:
no, the PTR (reverse dns record) can only be created by your ISP, so give them a call and ask them to create a prt record for   mail.domainA.com and also give them your external IP
so for all 4 domains.
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suppsawsCommented:
grmbl, I hate it that we can't edit our posts in EE, so another reply ...
the sbs blog says:
Updated 2/10/2009: Included new resolution.  If you already implemented the original resolution we recommend that you also implement the new resolution.  There is no need undo the previous fix.

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suppsawsCommented:
ow, this was for another issue, sorry :-)
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BahBah52Author Commented:
So I am asking my internet access provider to make a PTR record kinda like:

mail.domainA.com -> xxx.xxx.xxx.xxx (SBS IP)
mail.domainB.com -> xxx.xxx.xxx.xxx (SBS IP)
mail.domainC.com -> xxx.xxx.xxx.xxx (SBS IP)
mail.domainD.com -> xxx.xxx.xxx.xxx (SBS IP)

I then point from my hosting companies DNS servers:

(MX)
mail.domainA.com -> SBS IP
mail.domainB.com -> SBS IP
mail.domainC.com -> SBS IP
mail.domainD.com -> SBS IP

(A)
mail.domainA.com -> SBS IP
mail.domainB.com -> SBS IP
mail.domainC.com -> SBS IP
mail.domainD.com -> SBS IP

I then do this: http://sbs.seandaniel.com/2008/08/how-new-sbs-2008-internet-address.html for our main domain name. ie/ domainA.com

Then repeat this: http://sbs.seandaniel.com/2008/10/hosting-multiple-domains-on-sbs.html for secondary domain names. ie/ domainB.com domainC.com domainD.com

I then go through all users exchange properties unchecking the "use default email policy" checkbox and selecting the appropriate domain for them to send out as.

Does that sum the process up accurately ?




In addition,

Are there any other DNS records I should point at the SBS box for example for Remote Workplace, Mobile phone access (never used these before - our existing box is sbs2000).
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BahBah52Author Commented:
(and have I forgotten anything) ? - I should have added.
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BahBah52Author Commented:
and does this in anyway tie us into using SBS for website hosting ? I really don't like IIS and loath ASP. It is essential that we continue to host our sites on the linux box.

Thanks
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suppsawsCommented:
"(SBS IP)" >> your EXTERNAL ip that is, NOT the sbs internal ip.
the mx record is just 'mail.yourdomainX.com', doesn't point to an IP, that is what the a-record is for, that record points the 'mail.yourdmainX.com' to your external FIXED ip.
and the PRT record does the oposite.
no need to worry, the dns holders of your domainnames should know this.
and the internet provider also knows how to create a PTR record.

I then do this: http://sbs.seandaniel.com/2008/08/how-new-sbs-2008-internet-address.html for our main domain name. ie/ domainA.com
>>yes
Then repeat this: http://sbs.seandaniel.com/2008/10/hosting-multiple-domains-on-sbs.html for secondary domain names. ie/ domainB.com domainC.com domainD.com
>>yes
I then go through all users exchange properties unchecking the "use default email policy" checkbox and selecting the appropriate domain for them to send out as.
>> yes
Does that sum the process up accurately ?
>> yes :-)

and does this in anyway tie us into using SBS for website hosting ?
>> NO, you COULD host your website on the SBS, but I wouldn't advise it.
just keep it on the linux box, or host it externally (what I advise).
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BahBah52Author Commented:
Sorry, yes I meant external static IP by (SBS IP).

But you need a PTR record pointing this IP to every mail.domainA.com, mail.domainB.com etc. ? I always thought it was your hostname to IP.
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suppsawsCommented:
you just need to ask your ISP to create a PTR record for all these domains :
http://support.microsoft.com/kb/300171
some more info:
The PTR Record itself will look something like this:

z.y.x.w.in-addr.arpa.   PTR    mail.yourdomain.com
where z.y.x.w is your external ip

but don't worry about that, your ISP knows what to do :-)
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BahBah52Author Commented:
Just had a thought on this, by adding the domains like that presumably this occurs:

personA = personA@domainA.com
personA = personA@domainB.com

Meaning that every person can be accessed through either domain, is that right ? So basically their mailbox will accept mail from any domain so long as the username is correct ? This isn't really something we want, but not the end of the world I guess.
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suppsawsCommented:
"Meaning that every person can be accessed through either domain, is that right ?"
that is right, unless you remove the personA@domainB.com email address from the email properties of that user.
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BahBah52Author Commented:
Thanks for your help suppsaws :-)
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BahBah52Author Commented:
Thank you for your help :-)
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