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Hi Folks,
Just a quick note to let you know that this weekend, we're upgrading and moving some of our servers.
support.zimbra.com
bugzilla.zimbra.com
are the two that most of you may notice are down for a time. We're doing DNS updates which mean that you may not be able to access it until your DNS has updated.
I'll update this thread as more information becomes available.
Bugzilla
Wiki
Source
Upgrading Servers/DNS 
Linear Mode
