Trying to add domain alias but MX ip address not found on server because NAT is in use

Question asked by Jeremy Wesley - 2/19/2015 at 9:44 PM

Unanswered

HI all i'm trying to add a domain alias but it tells me that the domains MX does not point to a ip address on the server.

We are using NAT so the server and the IP addresses shown in SmarterMail are internal IP addresses.

1. Did I miss something on how to associate the external IP in smarter mail? Is this required?

2. How am I support to get around this error message.

I know the MX is setup correctly because I had the domain setup as a regular domain then I discovered domain alias after the fact..

Any help is greatly appreciated.

Jeremy

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Steve Reid Replied

2/20/2015 at 6:10 AM

We are natted also, and our firewall does not handle loopback well. I had to setup a dns copy for all our domains and point them to the internal IPs. This way when Smartermail does an MX check it hits our internal DNS and gets the right IP.

MARK Replied

5/8/2015 at 8:27 AM

Excuse my ignorance, but could you shed some specific light on how you did this? One complete example would be really helpful.

I am experiencing similar issues... SM is behind a firewall, but SM is not installed / setup on the box's primary IP. Received emails have a header of the primary IP only, despite the settings in SM and hence SPF is failing and some emails are getting blocked.

Thanks much for any assistance.

Steve Reid Replied

5/8/2015 at 8:37 AM

My example does not seem at all similar to your situation.

My work around is simply to appease SmarterMail itself. My external DNS is just the same as a normal setup. Since SPF has to do with external DNS you need to check there.

MARK Replied

5/8/2015 at 8:55 AM

Perhaps not. I saw the "loopback" which is something I figure is the term for one of the things I'm learning which differs between hardware and software firewalls - that fact that I cannot ping my own box's IPs, at least not the primary (all others work).

I will keep searching for something better matching. I appreciate your quick response.

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