This note only applies to those running MacOS X Server 10.3.x. Clients running other UNIX variants, or Windows are unaffected.

We have had a few reports of today's "Security Update 2005-003" for MacOS X Server causing POP mail services to fail, and in some cases crashing the server. This is only if you are are using the built-in Cyrus POP server in MacOS X Server 10.3, not a third-party POP server such as WebStar Mail or Communigate Pro. If you are running OS X Server 10.3, and the built-in POP server, we suggest that you delay the installation of "Security Update 2005-003" until more is known about this issue.

We are currently installing this update on a test server that is not running any mail services at all, and will update this post with results as soon as they are available.

UPDATE (23:10 PST): Our test server sems to be doing fine. So if you are NOT running the built-in POP server in OS X Server 10.3, it should be OK to run "Security Update 2005-003"... However, like all updates, it might be prudent to wait a day or so and let the reports come back from the field. It is always best practice to test these updates on NON PRODUCTION systems prior to deployment on live, production servers.