Mail server

Postfix MTA updated to fix security vulnerabilities such as incorrectly checks the ownership of a mailbox. In some configurations, this allows for appending data to arbitrary files as root. This update has been rated as having moderate security impact.

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Describes how to flush email queue from a shell prompt under UNIX / Linux operating system.

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In this tutorial yo0u will learn about Installing SSL Certificate (Secure Server Certificate) to secure communication between Postfix SMTP server and mail client such as Outlook or Thunderbird.

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Malware is used for a harmful purpose. It can be in your software or hardware. Email and free (don’t confuse with OSS) or pirated software is the most famous way to spread malware. It is inserted in a system w/o user notification. Wikipedia defines Malware as: Malware is software designed to infiltrate or damage a […]

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Postfix provides Mime header check for all incoming messages. You can put restrictions on .exe / .bat / .vbs files and block all attachments. mime_header_checks directive allows you to define file, you will place a restriction for any file extensions that you do not want to have passing through your mail sever system. On most […]

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Librenix has a posted small and sweet article that explains basic steps to configure and install a mail server with antivirus / antispam in minutes. From the article: This article illustrates a situation where you need to set up your own mail server (be it your home mail server, or a small office one). It […]

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Postfix is free and powerful MTA. You can easily configure Postfix to block spam. You need to add following directives to /etc/postfix/main.cf file: => disable_vrfy_command = yes : Disable the SMTP VRFY command. This stops some techniques used to harvest email addresses. => smtpd_delay_reject = yes : It allows Postfix to log recipient address information […]

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