As an IT service provider, we provide Barracuda email filtering service to our clients. We also have a client who is not receiving flight info (coming from omptrans.luv.southwest.com / IP 12.130.138.99) sent to his work email address (and protected by Barracuda's service). We are on the phone with Barracuda support as I type this. On 3/21 and 3/22, the client received SW emails from the domain and IP mentioned above. The problem was reported to us 3/23. In the Barracuda logs we can see the emails that were received earlier last week, but there is 0 record of any incoming emails after that. The client changed the email address on the SW account to his outlook.com address, and the email arrived just fine. We took the header of the received email and ran it through an analyzer at https://mxtoolbox.com and found that the IP address of the sending SW server is listed on two blacklist servers. This is not good, even though Barracuda does not use these particular blacklist servers, it is possible that the SW email server above is being blocked along the way because of it's blacklisting. In summary, we need SW to follow standard procedure to get their email server IP removed from the blacklists.
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