Hi All,
We've recently setup Office 365 on hybrid mode with Exchange Server 2010.
All was working well - until we installed Exchange Server 2013 (2012 R2) alongside 2010.
Users can no longer email outside of the organisation. We've checked the send connectors and it is setup to route all mail to mx record, and NOT smart host. (we CAN receive)
We ran the remote connectivity analyzer and it came back as failed, see below:
The outbound SMTP test failed.Elapsed Time: 22168 ms.
Attempting reverse DNS lookup for IP address 217.179.26.144.
Reverse DNS lookup failed.
Additional Details
IP address 217.xxx.xxx.xxx doesn't have a PTR record in DNS.
It also came back with:
The Microsoft Connectivity Analyzer wasn't able to find the SPF record.More than one SPF record was found. You may have only one SPF record.
we think we have resolved this last error by removing the SPF records and replacing with one LIKE this:
v=spf1 ip4:10.10.10.1/16 mx ptr:Sender.domain.com include:spf.protection.outlook.com ~all
Any help would be greatly appreciated
Thanks in advance,
DG
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