The 10.6.5 update for Mac OS X Server, removed earlier today, has been restored with a fix for an e-mail delivery bug found in the original version. The new build, 10H575, fixes a memory aliasing issue introduced in the earlier version in Dovecot's handling of user names, resulting is mail potentially being delivered to the wrong user on machines using Dovecot as a mail server. The issue only affects machines running the earlier-posted version of 10.6.5 Server, and also does not affect the original Dovecot open-source project.
