Exchange Server 2010 - Cant receive external emails on other accepted domains

I have a Windows Server 2008 R2 server running Exchange Server 2010 with multiple accepted domains.

The main domain (mescorp.com.au) on which the server is built can send and receive emails from external and internal

The other accepted domain (thevixengroup.com.au) which is totally different can send and receive internally but can only send externally.

mail.thevixengroup.com.au is pointing to the same IP as mail.mescorp.com.au

Email address policy's have been configured for both domains and both have been applied. mescorp.com.au is priority 1 and thevixengroup.com.au is priority 2

Why would mescorp.com.au work and thevixengroup.com.au not work?
tiemannitservicesAsked:
Who is Participating?
 
Will SzymkowskiSenior Solution ArchitectCommented:
In order to Receive externally you need to make sure that your MX records are pointing to your Public IP you are using for Exchange. This can also be a smart host or some sort of edge server. If your having isses receiving Externally then first place i would start is make sure MX is correct and also nothing is being queue'd on your Smart host appliance.

Will.
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Patrick BogersDatacenter platform engineer LindowsCommented:
Hi

Do the mails show up in the message tracking center?

Can you post a screenshot for the accepted domains?
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tiemannitservicesAuthor Commented:
Accepted domains

accepteddomains
How do I track messages from external?
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Patrick BogersDatacenter platform engineer LindowsCommented:
Hi

This looks normal. In ESM -> Toolbox you have message tracking center.
Do the incoming mails for the other domains show there with maybe even a error?
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tiemannitservicesAuthor Commented:
Hi

I think I have solved my issue. If i have ill let you know what it was. If not we will keep troubleshooting

Thanks
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MAS (MVE)EE Solution GuideCommented:
You can check the flow using this
https://testconnectivity.microsoft.com/
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Patrick BogersDatacenter platform engineer LindowsCommented:
Sounds promising.... cant wait to hear from you again.
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tiemannitservicesAuthor Commented:
Problem solved. Issues was in my MX record. I know i said it was the same as mescorp.com.au but it wasnt. I was missing one word and I had simply over looked it. The MX record read thevixengroup.com.au instead of mail.thevixengroup.com.au

Thanks everyone for your suggestions
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tiemannitservicesAuthor Commented:
I've requested that this question be closed as follows:

Accepted answer: 0 points for tiemannitservices's comment #a39792882

for the following reason:

I solved my issue myself
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Patrick BogersDatacenter platform engineer LindowsCommented:
Hehe glad you found it.
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MAS (MVE)EE Solution GuideCommented:
First of all glad to know it is fixed.
It is my request to award points to "Will Szymkowski"  and to me as both gave you the idea on how to check the flow.

At-least award the points to Will as he clearly explained you the first step to check which fixed your issue

You can ignore if you think this is not eligible for points.
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