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Cant receive external emails on sub-domain

Hi Guys\Girls

I have a Exchange Server 2010 running domain mescorp.com.au. This domain can send and receive internally and externally fine
There is a sub-domain attached to mescorp.com.au called usa.mescorp.com.au. This sub-domain can send\receive internally and send externally but not receive externally

I know this is a DNS issue but I dont know what I'm missing in the DNS records
I have put this MX record into DNS - usa.mescorp.com.au -> mail.mescorp.com.au. Priority set at 20

The main domain MX record is set at - mescorp.com.au -> mail.mescorp.com.au. Priority set at 10 and again that is working fine

Any help is greatly appreciated

Thanks in advance

Michael

rick81

your mx setup looks correct. i check it at mxtoolbox.

a telnet of usa.mescorp.com.au 25 fails and points to webhost.tienmannhostingservices.com.au "we do not authorise the use of this system to transport unsolicited email, blah, blah, blah

have you only recently updated your DNS records for usa.mescorp?

Md. Mojahid

Is that the real subdomain name, abc.gunung.com? If so, you are missing the mx records in your public DNS server.

http://www.mxtoolbox.com/SuperTool.aspx?action=mx%3aabc.gunung.com

rick81

the sub domain is usa.mescorp.com.au

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rick81

maybe i should get the points for this one? glad your problem is sorted.

your mx setup looks correct. i check it at mxtoolbox.

a telnet of usa.mescorp.com.au 25 fails and points to webhost.tienmannhostingservices.com.au "we do not authorise the use of this system to transport unsolicited email, blah, blah, blah

have you only recently updated your DNS records for usa.mescorp?

tiemannitservices

ASKER

What I had done was correct it was just a matter of time