Security

Latest Articles

SpamAssassin

Regarding spam protection strategies in Zimbra, a mention deserves SpamAssassin, an Open Source anti-spam platform that can provide system administrators with a filter that can classify emails and block spam....
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Firewall ports in Zimbra

One of the main weapons of modern cybercriminals is the port scanner, thanks to which they find servers that are susceptible to certain vulnerabilities and then attack them. That is...
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How to install and update Let’s encrypt for Zimbra

Using certificates to secure your data and mail traffic is something that is extremely important. We have seen, in the " Zimbra SSL/TLS Commercial Certificate " article, how they work...
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Zimbra Collaboration Suite and Anti-Phishing

Let's get back to dealing with security and especially email security, going to address a delicate and extremely important topic like Phishing and see what measures can be taken in...
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Enterprise Security black, white and gray lists

Zimbra incorporates a spam filter that allows you to reliably protect your company's mail from receiving infected messages that are not related to business correspondence. We've seen how to manage...
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Zimbra Black List and White List

Speaking of email security and spam, there are many factors to consider as we have seen in the incoming and outgoing mail protection best practices articles. Surely, however, we can...
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Improve the security using Zextras 2FA

Security is not an option. Unfortunately, many companies meet security only after an attack has been received, or when they have to limit the damages of a data breach. Security...
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Setting up a password security policy in Zimbra

Along with encrypting emails and using digital signatures, one of the most effective and low-cost ways to protect email from hacking is a competent password security policy. Passwords written on pieces...
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Zimbra SSL/TLS Commercial Certificate

Nowadays the use of an SSL (or even better TLS) system to protect your connections has become almost a must. We have seen in this article what SSL certificates are...
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Zimbra Best Practices: Improve outgoing Email Security

Today, in this article, we want to cover an interesting aspect to be considered once you have Zimbra installed: how to improve the security of the emails you send. Zimbra...
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Zimbra Best Practices: Incoming Mail Protection

I believe that one of the most important aspects related to e-mail is security management, both in terms of possible attacks, such as malware or viruses, and in terms of...
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MTA: A General Overview

Mail Transfer Agent (MTA) is a software that transfers e-mail messages from one computer to another via SMTP. Mail Routing Scenarios We want to introduce you to some pretty common...
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The importance of keeping Zimbra constantly updated

Today we want to talk about a very important aspect that should not be underestimated when using Zimbra OSE and Zextras Suite: upgrading.Many of you will wonder why it is...
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Enabling CBPolicyD (Cluebringer PolicyD) WebUI

PolicyD v2 (codenamed "cluebringer") is a multi-platform policy server for popular MTAs. This policy daemon is designed mostly for large-scale mail hosting environments. The main goal is to implement as...
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How To Setup SNI In Zimbra OSE?

In this article, you will learn about the SNI setup in Zimbra. It would be important for you to set up Zimbra SNI as you can serve your users not...
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What is SNI in Zimbra OSE?

In this article, you will learn about SNI and Zimbra SNI. It would be important for you to set up Zimbra SNI as you can serve your users not being...
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Postscreen Attributes Explained

Zimbra Postscreen Zimbra Postscreen is an anti-bot/dos started in Zimbra 8.7. It tackles mail server overload by keeping spambots away and making more SMTP processes available for legitimate clients. Zimbra...
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How To Use Zimbra Postscreen?

In this article, you will learn about using and configuring Zimbra Postscreen. Zimbra Postscreen Zimbra Postscreen is an anti-bot/dos started in Zimbra 8.7. It tackles mail server overload by keeping...
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