Who We Are
We are the global Zimbra experts with customers in more than 20 states and 10 countries. Our proprietor, Mark Stone, adopted Zimbra for his own company in 2005 and became a Zimbra Partner in 2006. ...Read more... "Who We Are"
What We Do
We provide our customers with email systems that are performant, reliable, secure and cost-effective — systems that meet each customer’s Mission Critical Email needs. Zimbra Hosting, Licensing, Training and Professional Services Mission Critical Email is...Read more... "What We Do"
This post contains our current Zimbra Fail2Ban Best Practices and will show you how to configure Fail2Ban optimally on your Zimbra servers. Bad actors, overly...Read More "Zimbra Fail2Ban Best Practices – Updated for 2023"
MariaDB is the single most common bottleneck we see when doing performance tuning on customers' Zimbra servers. This Zimbra-specific MariaDB performance tuning guide will help...Read More "Zimbra MariaDB Performance Tuning Guide"
Zimbra 10 Daffodil is the first majorly innovative release from Zimbra in a number of years. Daffodil has been General Availability since March 2023 and...Read More "Zimbra 10 Daffodil Review and Migration Guidance"
Zimbra servers make a lot of DNS requests, so having a locally available caching DNS server system for Zimbra to use is important. In helping...Read More "Configuring BIND9 Caching DNS Servers For Zimbra"
Zimbra mailbox servers on Ubuntu 18/20 can benefit from Linux kernel tuning to reduce swap file usage. This post will show you how. Note: this...Read More "Zimbra Linux Kernel Tuning To Reduce Swap File Usage"
We know that deploying MTA-STS better secures inbound email and can prevent MITM and downgrade attacks. But you need a public web server to host...Read More "Host Your MTA-STS Text File on Amazon Web Services For Pennies Per Month"
Historically, Zimbra firewalling has focused on regulating only Inbound traffic, but we can better protect our Zimbra systems if we also regulate Outbound traffic by...Read More "Zimbra Security Tip – Regulate Outbound Traffic With Stateful Firewalls"
Sometimes we want to block specific domains from sending email to any of our users. If you followed the instructions to prevent nested address spoofing,...Read More "Zimbra Postfix – System-Wide Sender Domain Blocking"
The Zimbra Network Edition NG module enables a Zimbra Global Admin to create Domain Admins right from the Admin Console. But suppose you want to...Read More "Zimbra Custom Delegated Admin Account – Password Resets Only"
Zimbra's Distribution Lists are widely deployed on account of their powerful productivity-enhancing features, but in a default Zimbra installation, anyone anywhere can send email to any...Read More "Secure Your Zimbra Distribution Lists From Bad Actors"