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Exchange Server not receiving emails from Gmail accounts

Posted on 2008-10-01
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Last Modified: 2012-08-13
I have been alerted that emails from users with Gmail accounts are not getting through to our users. We are running Exchange Server 2003 SP2.
I researched the problem here on EE, and found a long, elaborate discussion about this exact problem (ID #23302358). The resolution was that they created a new rule in their firewall to allow all outbound traffic. As quoted in the answer: "Adding a rule that allowed ALL traffic out which started at our mail server, everything seemed to work."
As we seem to be having a similar problem, I wanted to try this solution, but don't want to create a rule in our PIX that is not correct. We have a Cisco Pix 506e. There seems to be a rule already in there that is allowing all "IP" traffic outbound, but not TCP traffic. So do I need to make a rule to allow all TCP traffic going out, or should it be something else?
Any advice would be appreciated, but if you can answer, please be very specific about how the rule should be created. I'm always a bit nervous about our firewall. :-)
Thanks!

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Question by:Rohidas357
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harbor235 earned 500 total points
ID: 22616317
If there is a rule allowing any IP traffic outbound then what does the inbound ACL look like on the outside interface. Also, take a look at all interfaces in question to if there are ant additional inbound or outbound ACLs.

an inbound acl that allows mail inbound should look like this;
access-list outside permit tcp any host <mailserver_external_ip> eq 25
of course there would be a command to bind the ACl to the outsid einterface;
ip access-group outside in interface outside

harbor235 ;}
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by:Rohidas357
ID: 22670506
It turns out that this problem just cleared up by itself, apparently. One day we could not get emails from a gmail account, next day we could. Can't explain it, since I didn't get to try the fix that was suggested, but it was just one senders account that was a problem, as far as we know.

Anyway, I will close this question and assign points.
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