Introduction Learn how to enable and configure SPF checking for incoming emails in Zimbra using cbpolicyd. This guide covers essential steps to enforce SPF checks, enhancing email security and reducing spam. In the digital age, email security is paramount. One effective way to bolster your email defense is by enforcing SPF (Sender Policy Framework) checking for incoming emails. By default, SPF checking in Zimbra is not enabled and requires configuration. This tutorial will guide you through the process of enabling and configuring SPF checks using cbpolicyd in Zimbra, ensuring your email system is protected from spoofing and unauthorized use. Links to below you maybe likes: zimbra 8.6 cbpolicyd example How to install and configure zimbra multi server. How to restrict to user sending mail on zimbra 8.6. How to Restrict Sending to Distribution list in zimbra mail. How to change last login time for all accounts in zimbra ldap. How to zimbra reject authenticated sender login mismatch. ...

Introduction Discover why Zimbra 8.8 is the top choice for mail servers. Learn about its new features, including Realtime Backup, Mobile Sync, HSM, and more. Follow our step-by-step guide on installing Zimbra 8.8 on CentOS 6. In today's digital landscape, having a reliable and feature-rich mail server is crucial for businesses of all sizes. Zimbra 8.8 stands out as a leading solution, offering advanced features that cater to the needs of modern organizations. Whether you're looking for enhanced security, better storage management, or seamless mobile integration, Zimbra 8.8 has it all. In this article, we’ll explore the new features of Zimbra 8.8, why it's the best choice for your mail server, and provide a step-by-step guide on how to install Zimbra 8.8 on CentOS 6. What’s New in Zimbra 8.8? Zimbra 8.8 introduces a host of new features that make it the preferred choice for email server management. Let's dive into the most notable enhancements: 1. Realtime Backup One of...

In this  tutorial, How to configure whitelist and blacklist domain in zimbra . To use amavisd.conf.in file before it's configure, To backup file /opt/zimbra/conf/amavisd.conf.in we need to score Positive is Blacklist and Negative score is whitelist. I'm running the commands with account zimbra ( su - zimbra) Links to below you maybe likes: zimbra custom spamassassin rules How to create auto Bcc for Recipient mails for Zimbra 8.6 How to add spam filters on zimbra 8.6 How to create auto Bcc for sender mails for Zimbra 8.6 list accounts that has not logged in for the last x days in zimbra Whitelist and Blacklist domain in zimbra 8.6 To backup amavisd.conf.in file su - zimbra cp /opt/zimbra/conf/amavisd.conf.in /opt/zimbra/conf/amavisd.conf.in.bak How to whitelist domain in zimbra To add whitelist domain or emailID  in amavisd.conf.in file vim /opt/zimbra/conf/amavisd.conf.in The content whitelist domain as below: { # a hash-type lookup table (associative array) ...

Introduction Learn how to create a reverse DNS lookup script in Bash from basic to advanced levels. This detailed guide includes examples, explanations, and common FAQs to help you master DNS lookups. Includes a complete script for practical use. Reverse DNS lookup is a process used to determine the domain name associated with an IP address. This is particularly useful in network troubleshooting and server management. In this guide, we'll walk through creating a reverse DNS lookup script in Bash , starting from basic concepts and advancing to more complex implementations. By the end of this article, you'll be able to create a robust script to perform reverse DNS lookups efficiently. What is Reverse DNS Lookup? Understanding DNS DNS (Domain Name System) is like the phonebook of the internet, translating human-friendly domain names to IP addresses. Reverse DNS lookup works in the opposite direction, mapping IP addresses back to domain names. Importance of Reverse DNS Lookup Rever...

How to prevent spam on zimbra. To use zimbra spamassassin filter. To backlist and whitelist all email from address or domain. To spam-check mail incoming email to system your email or To spam-check internal mail. To use zimbra 8.6 and later, The commands as below running on zimbra MTA.  Links to below you maybe likes: zimbra custom spamassassin rules How to create auto Bcc for Recipient mails for Zimbra 8.6 How to add spam filters on zimbra 8.6 How to create auto Bcc for sender mails for Zimbra 8.6 list accounts that has not logged in for the last x days in zimbra zimbra custom spamassassin rules Enabling SpamAssassin rule updates su - zimbra zmlocalconfig -e antispam_enable_rule_updates=true zmlocalconfig -e antispam_enable_restarts=true zmlocalconfig -e antispam_enable_rule_compilation=true zmamavisdctl restart zmmtactl restart To check and configure zimbra Spam Subject Tag, zimbra Spam Tag Percent, zimbra Spam Kill Percent attribute. zmprov gcf zimbraSpamSubjectT...

How to block backscatter email on zimbra. How many reasons why bounces from spam email. To run commands as below su - zimbra zmprov mcf zimbraMtaEnableSmtpdPolicyd TRUE zmprov mcf zimbraMtaSmtpdRejectUnlistedRecipient yes zmprov mcf zimbraMtaSmtpdRejectUnlistedSender yes zmprov mcf +zimbraMtaRestriction "check_policy_service unix:private/policy" zmmtactl restart zmconfigdctl restart The solve problem Bounces backscatter from spam email

How to auto copy of all email from bcc2_huupv@mail.huuphan.local to huupv@mail.huuphan.local. Every email recipient of bcc2_huupv@mail.huuphan.local from email another, then automation bcc send to huupv@mail.huuphan.local.   How to create auto Bcc for sender mails for Zimbra 8.6 To check "recipient BCC Maps" recipient_bcc_maps on your zimbra 8.6 $ postconf | egrep "recipient_bcc_maps" To configure recipient bbc maps on zimbra 8.6 # su - zimbra $ cd /opt/zimbra/postfix/conf/ To create recipient_bcc $ vim recipient_bcc Input the content as below bcc2_huupv@mail.huuphan.local huupv@mail.huuphan.local To add recipient_bcc_maps in main.cf file $ vim /opt/zimbra/postfix/conf/main.cf To add the following line in below recipient_bcc_maps = lmdb:/opt/zimbra/postfix/conf/recipient_bcc To apply configure recipient_bcc_maps $ postmap /opt/zimbra/postfix/conf/recipient_bcc To restart the zimbra postfix $ postfix reload To check "Recipient BCC Maps" recipi...

Introduction Learn how to add and manage spam filters on Zimbra 8.6. This comprehensive guide covers basic to advanced techniques, including practical examples to enhance your email security and reduce spam. Spam emails are a constant nuisance, cluttering inboxes and posing security risks. Zimbra 8.6 provides robust tools to combat spam effectively. In this guide, we'll walk you through the process of adding spam filters to Zimbra 8.6, covering everything from basic setup to advanced configurations. Links to below you maybe likes: zimbra custom spamassassin rules How to create auto Bcc for Recipient mails for Zimbra 8.6 How to add spam filters on zimbra 8.6 How to create auto Bcc for sender mails for Zimbra 8.6 list accounts that has not logged in for the last x days in zimbra Setting Up Basic Spam Filters Checking Current Settings Before adding new spam filters, it’s essential to check the current spam filter settings. You can do this by logging in as the Zimbra user and ru...