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Home > Archive > IIS and SMTP > May 2004 > email not returning, dns/smtp server behind nat
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email not returning, dns/smtp server behind nat
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| atomwalker 2004-05-12, 11:52 am |
| I'm using sbs2003 and the outgoing mail works fine, but incoming doesn't. It seems to be due to having a local ip address for the server. Ports are properly forwarding from an adsl modem/router. DNS zones are entered for ns1.myname.com with the global add
ress of the modem. But since my actual dns server is ns1.myname.local it doesn't respond to querries to ns1.myname.com. The outgoing mail also seems to be stamped with the .local and local ip address.
Can I create a virtual dns server called ns1.myname.com on the same ns1.myname.local, would that work? Then create a virtual smtp server with the global address of the modem. Or would that be an address conflict with ns1.
What is the solution?
Thanks for your ideas.
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| Peter D. Hipson 2004-05-18, 7:37 pm |
| I'm going to try to do thsi answer the easy way.
I've an almost identical setup here. I've run both Exchange Srver, and
Windows 2k3's SMTP as well. Port forwarding setup to forward to the
server.
Incoming works fine. Outgoing works fine. The name stapm x.local
should not affect either in or outgoing email.
Your (external, on the Internet side) DNS must have a MX record
pointed to your router/bridge to receive emails. No MX record, no
incoming email. Were I to guess, that is your problem.
Your internal DNS can have MX records too (mine is setup that way)
that reflect the internal server's IP address (not the router's
address on the Internet: you can't go that way...)
So, said another way:
you need a DNS outside your organization (usually provided by your
ISP) that has a MX record pointed to your router/bridge (DSL modem)
IP. The Router/brideg/modem then port forwards to the internal IP
address.
On Wed, 12 May 2004 08:16:09 -0700, "atomwalker"
<anonymous@discussions.microsoft.com> wrote:
>I'm using sbs2003 and the outgoing mail works fine, but incoming doesn't. It seems to be due to having a local ip address for the server. Ports are properly forwarding from an adsl modem/router. DNS zones are entered for ns1.myname.com with the global ad
dress of the modem. But since my actual dns server is ns1.myname.local it doesn't respond to querries to ns1.myname.com. The outgoing mail also seems to be stamped with the .local and local ip address.
>
>Can I create a virtual dns server called ns1.myname.com on the same ns1.myname.local, would that work? Then create a virtual smtp server with the global address of the modem. Or would that be an address conflict with ns1.
>
>What is the solution?
>
>Thanks for your ideas.
PeterD, the Darkstar Network
To email, fix my address!
ExpertZone!
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