Tags: postfix

Blocking of International Spam Botnets with a Postfix Plugin

This article contains an analysis and solution for blocking of international SPAM botnets with on postfix mail servers by using a postfwd plugin which analyses the sasl connects by country.   One of the most important and hardest tasks for every company that provides mail services is staying out of...
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Mail server
In the final part of this tutorial series, we go into detail on how to set up virtual users and mailboxes in Dovecot and Postfix.

Building an Email Server on Ubuntu Linux, Part 3

Welcome back, me hearty Linux syadmins! In part 1 and part 2 of this series, we learned to how to put Postfix and Dovecot together to make a nice IMAP and POP3 mail server. Now we will learn to make virtual users so that we can manage all of our users in Dovecot. Sorry, No SSL. Yet. I know I...
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mail server
In this series, we will show how to build a reliable configurable mail server with Postfix, Dovecot, and OpenSSL on Ubuntu Linux.

How to Build an Email Server on Ubuntu Linux

In this fast-changing world of containers and microservices it's comforting that some things don't change, such as setting up a Linux email server. It's still a dance of many steps and knitting together several different servers, and once you put it all together it just sits there, all nice and...
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Learn how to mitigate issues when your mail server is stressed.

Destress Your Mail Server with Postfix Troubleshooting Tips: Part 2

As I discussed in the previous article, it’s clearly important to know when your trusty mail transfer agent (MTA) is struggling to perform its duties. In this article, I’ll take a closer look at some warning signs and consider potential ways to mitigate issues when you spot that your server is...
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Learn how to process emails more efficiently and debug various MTA issues.

Destress Your Mail Server with Postfix Troubleshooting Tips: Part 1

Several mail servers are available on the market today. Some are rather confounding to configure but are super-reliable. Others are a little old school and rely on no small degree of background knowledge to get them up and running. According to the website Mail Radar, in a randomized survey of 59,...
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Learn how to manage unsolicited email with Postscreen.

How to Use Postfix Postscreen to Test Email for Spam: Part 2

In the previous article, I looked at some pre-greeting tests that Postfix performs to help identify spam; now I’ll move on through the chain and explore the available post-salutation tests. Remember that limiting how many machines make it to this stage is of significant value to a mail server’s...
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junk mail
Learn how Postscreen can help filter out spam.

How to Use Postfix Postscreen to Test Email for Spam: Part 1

I recently read with interest that the powerful mail transfer agent (MTA) that is Postfix has introduced a relatively new addition to its load mitigation and anti-spam arsenal. As of version 2.8, Postfix now incorporates Postscreen. In previous versions of the mail server, only one connection...
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How to Set Up Virtual Domains and Virtual Users in Postfix

A previous tutorial covered how to install a Postfix mail server and test it with mailx. Now we’ll introduce email aliases, set up virtual domains and users, and do a little troubleshooting. My first professional introduction to serving HTTP was via the clever Roxen Web Server when I worked for an...
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 MTA (Mail Transfer Agent) Postfix
The rocket-fueled MTA (Mail Transfer Agent) that is Postfix has such a wide array of features that quite honestly it’s a struggle to know where to begin.

How to Install and Test a Postfix Mail Server

These days more people than ever feel compelled to get their e-mail fixed super-swiftly if it ever fails. When used several times a day, every day of the year, some of us feel truly bereft when e-mail isn’t available to us. There’s even recognised medical conditions relating to those who...
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