I am running the network edition (yes, I am not a freeloader and actually paid!) and last week I thought it would be a good idea to upgrade.
I have a server running the free version for personal use, so I tested there first, and the update ran great. No issues at all. I was so happy.
I upgraded my office server last night, from 5.0.16 to 6.0.3_GA_1915 and the upgrade ran without incident.
Now though, I am unable to send or receive any email at all. This server was working just fine, until I ran the upgrade.
Things that the upgrade broke:
1. SSL certificates were gone. I had to go rebuild them, and the Admin UI just kept throwing errors at me so I had to manually provision them from the command line. They work now.
2. Email IS sent, and it is not being received. Any email I send to my server results in a bounce that says:
<firstname.lastname@example.org>: mail for medata.com loops back to myself
I have compared every field with my working test server to that of my now broke production machine. All I can find is that if I change ANYTHING on the Configuration -> Servers -> mail.blahblahblah.com settings, I get a pop-up with all kinds of interesting Java errors now.
Anybody else seen this? As a commercial user I do have an official ticket open, but it's been two hours without a response so I'm reach out to the community.
Oh also if you are thinking of upgrading to 6 from 5... Might want to not do that unless you have a DR server waiting in the wings to swap in.