Exchange Email bounces to a certain google apps domain (sometimes)

There is one domain that bounces our emails on a regular basis.  The domain is setup under google apps and we're sending from our exchange server.   Our MX record, banners, etc appears to be fine and we're not having issues sending to any other domain.  Sometimes it works, but usually it bounces.

There bounce message is:

user@theirdomain.com on 8/24/2015 9:25 AM
            There was a SMTP communication problem with the recipient's email server.  Please contact your system administrator.
            <mail.pmcommunities.com #5.5.0 smtp;550-(mail.ourdomain.com) [nnn.nnn.nnn.nnn]:64923 is currently not permitted>

It seems it would be on their side.   Even it is, I would like to help them fix it.
clyde30152Asked:
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systechadminConsultantCommented:
Could you please paste the whole email headers?
bas2754Commented:
The message you are getting is from their mail server stating that something setup in their system is denying your email domain from being allowed to send messages to their server.  Unfortunately to solve this is a bit tricky since Google Apps support is not the most responsive in the world.

Things to check on your side:

Ensure an SPF record for your domain exists authorizing your server(s) IP(s) to send email on behalf of your domain.  Ensure that the reverse DNS for your IP Address(es) for your Sending Server(s) matches the DNS name.  IE if smtp.mydomain.com is the DNS address of your sending server and it resolves to 10.10.10.10  then ensure that when you do a reverse lookup on 10.10.10.10 that it resolves to smtp.mydomain.com.

Check blacklists to make sure your server is not on any known spamming lists.  A good tool for this is http://www.mxtoolbox.com

Had the Google Apps Admin for the domain you are having problem sending to put in a support request with Google to ask why these emails are bouncing.

One last thing, checking the domain you show in the error message, that is definitely NOT a Google Apps mail server meaning they look like they are running their mail server on a different server or are running it themselves.  This would make a lot more sense since that would mean they are likely using a SPAM filter of some sort that they just need to change your domain to be allowed through it.

More help would require more detailed messages.

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clyde30152Author Commented:
We're not only any blacklists and the reverse DNS is in place.    The only thing I'm not sure about is my SFP record which is v=spf1 ip4:nnn.nnn.nnn.nnn ~all (ofcourse, I took out the IP address).

I will try to find out her their admin is and have them put in a ticket with google.
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bas2754Commented:
I am nearly certain that the IP for mail.pmcommunities.com is NOT a google server.  In fact when I do a whois lookup of that IP it resolves to 173.221.7.201 and shows as being a Windstream IP address. Normally Google Apps Hosted email has several (may 5?) MX records and this only has one.  

So again, if that is the correct DNS name of the folks you are trying to send to, then this is most likely NOT a Google Apps mail server and the problem is one that is local to that company -OR- it is on a shared mail server that is hosted by someone other than Google.

Let me know if we can be of any further assistance.
systechadminConsultantCommented:
I have checked and it seems that it is Exchange server not googleapps domain. Hosted with GoDaddy. Kindly contact godaddy as it seems that your domain is not permitted to send the email. They might have some restriction.
clyde30152Author Commented:
I'm pmcommunities.com and I'm on exchange.

The problem was with the MX record for the other guy using google apps.  It has been resolved.  It only took me a month to convince them it was on their side.    

Thanks for your help.
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