Patch 5 is here for the Zimbra 8.8.15 “James Prescott Joule” GA release, and it includes fixes as listed in the release notes.
Zimbra 8.8.15 is now fully supported on UBUNTU18 (GA).
Download the latest UBUNTU-18 binaries from https://www.zimbra.com/downloads.
OpenJDK: updated packages are available for this release.
Check out the Upgrade openjdk on non-mailstore node for FOSS and NETWORK.
For 8.8.15 Patches, you don’t need to download any patch builds. 8.8.15 Patch packages can be installed using Linux package management commands. Please refer to the release notes for Zimbra 8.8.15 Patch 5 installation on Red Hat and Ubuntu platforms.
Note: Installing a zimbra-patch package only updates the Zimbra core packages.
Your Zimbra Team