Hi Masim,
You are receiving this email because you are a Zimbra Collaboration customer. It has recently been discovered that Zimbra Collaboration Server 8 is susceptible to the OpenSSL Heartbleed bug.
Zimbra has produced an OpenSSL patch for versions 8.0.3 to 8.0.7. It is critical to apply this patch to prevent criticial security vulnerabilities. The patch is located here: http://files.zimbra.com/downloads/security/zmopenssl-updater.sh
If you are running a version prior to 8.0.3, your server is susceptible to other critical security vulnerabilities, so you would please need to upgrade to a secure version first, then run this patch. This patch fixes only the OpenSSL package included with the ZCS distribution, and does not update the OpenSSL package that may be included with the Operating System. Please also be sure to keep your OS up-to-date for OS patches. ZCS 7.x is not affected by this vulnerability.
We have provided detailed steps to patch on our forum announcements. Related information about this and other security fixes can be found in this forum.
If you need assistance with running this patch, please open a case at https://support.zimbra.com
Thank you,
Zimbra Support