wierd issue with exchange

Hello
 I have the same issue at a client of mine. not recieveing mail from outside. they can send inside from outside no problem, and internal to internal. but messages from outside in never arrive? I have restarted the services and dns. I had this problem before and we resolved it, but am not sure how. Any help would be great I can also hit the webmail from outside. thank you
zenworksbAsked:
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dynamitedotorgConnect With a Mentor Commented:
Yes.

They (or Postini) are receiving the mail for the domain, they should be able to tell you what is happening with it.
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dynamitedotorgCommented:
Does the domain still exist? It might have recently expired.
Do the MX records for the domain point to the right server/servers?
Can you connect to port 25 on the server from outside?

Some of these tests can be done via http://www.dnsreport.com
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zenworksbAuthor Commented:
everything passed in dnsreport. what else can I check?
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dynamitedotorgCommented:
Do the MX records point directly to the clients Exchange server or a third party?
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zenworksbAuthor Commented:
where do I check that?
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dynamitedotorgCommented:
The "Mail test" check on dnsreport will tell you what the MX records are set as. If you put an actual email address in there it will attempt delivery to check if the server is contactable.
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zenworksbAuthor Commented:
all of it passed when I put in a e-mail address?
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dynamitedotorgCommented:
But do the MX records point directly to the client or a third-party?

If they point directly to the client then the fact that delivery worked means that the mail is in theory getting as far as the server.
If they point to a third-party then there is a problem with the third-party sending the mail onwards.

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zenworksbAuthor Commented:
thank you so much for you help where is that option again you said the mail test but what is the test exactly thank you
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dynamitedotorgCommented:
The mail test looks up the MX records for the domain, then trys to deliver a mail to one of them (assuming you put an email address in). At the top of the results page it will show you the MX records.

For each MX records it should give the host name, preference, and IP address.

Do the MX records refer to the actual IP address of the clients exchange server or not?
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zenworksbAuthor Commented:
this is what I see so should I contact netlojix?

Your 5 MX records are:

200 netlojix.com.netlojix.mail2.psmtp.com. [TTL=300] IP=64.18.4.11 (No Glue) [TTL=13604] [US]
300 netlojix.com.netlojix.mail3.psmtp.com. [TTL=300] IP=64.18.4.13 (No Glue) [TTL=13604] [US]
400 netlojix.com.netlojix.mail4.psmtp.com. [TTL=300] IP=64.18.4.14 (No Glue) [TTL=13603] [US]
500 vmail1.netlojix.com. [TTL=300] IP=199.201.128.21 [TTL=3600] [US]
100 netlojix.com.netlojix.mail1.psmtp.com. [TTL=300] IP=64.18.4.10 (No Glue) [TTL=13602] [US]
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zenworksbAuthor Commented:
it was postini and they know of the issue thank you
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