Tag Archives | zimbra security

Zimbra SkillZ: Using Zimbra with Strong TLS Configuration – Get an A+, No Weak Cyphers (updated August 2023)

Transport Layer Security (TLS) encrypts data sent over the Internet to ensure that eavesdroppers and hackers are unable to see what you transmit which is particularly useful for private and sensitive information such as passwords, credit card numbers, and personal correspondence. (further reading: https://www.internetsociety.org/deploy360/tls/basics) In this article you will learn how to configure Zimbra to […]

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Zimbra SkillZ: Enhance email confidentiality using MTA-STS

Hi Zimbra Customers, Partners & Friends, Do you want to prevent man-in-the-middle attacks and enhance your email confidentiality? You can with MTA-STS. MTA-STS is short for Mail Transfer Agent (MTA) Strict Transport Security (STS). MTA-STS enforces encryption and secure communications between SMTP servers via TLS (Transport Layer Security). With MTA-STS fully implemented, it prevents man-in-the-middle […]

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Zimbra Now with TLS 1.3 Support!

Hello Zimbra Partners, Customers & Friends, In the latest Zimbra patch, Zimbra 9.0.0 “Kepler” Patch 13 and 8.8.15 “James Prescott Joule” Patch 20, the following packages are now GA: OpenSSL 1.1.1h support for TLS 1.3. OpenSSL 1.1.1h with FIPS module support. Postfix 3.5.6 support for TLSv1.3 Nginx 1.19.0 support for TLSv1.3 Why is this important […]

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Zimbra Admin Reminder … Block “memcrashd” Port 11211

Hello Zimbra Friends & Admins, This is a friendly reminder that Zimbra memcached may face the “memcrashd” attack on port 11211. By default, memcached listens on a server IP address that is accessible on the network and via the internet if there is no firewall. If your Zimbra memcache servers are behind a firewall, we […]

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Zimbra Wiki to Latest Patches & More!

Hello Zimbra Friends,   Looking for the latest Zimbra Patch?   This Zimbra wiki page lists all Zimbra product releases with a link to the current Patch: https://wiki.zimbra.com/wiki/Zimbra_Releases   Click a Patch link for additional details + installation instructions. Important Patch install info: Patches are cumulative, so you usually don’t need to install any prior patches. […]

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