Send all outgoing email trough one IP address in postfix

When a server has more than one IP address, then postfix will use all IP addresses randomly to send out emails. This can cause your emails to be listed as SPAM on other servers because the sending IP does not match the reverse IP of the server hostname. The solution is to bind postfix to ... Read more

How to enable DKIM email signatures in amavisd-new and ISPConfig 3.0

NOTE: This post is about ISPConfig 3.0 and not 3.1 and newer. ISPConfig 3.1 and newer has DKIM support builtin, you can simply enable DKIM in ISPConfig 3.1 GUI now for the mail domain. DKIM is a system to verify the sender and integrity of emails. ISPConfig 3 uses amavisd-new as content filter for spam ... Read more

How to disable Apache mod_security for a website in ISPConfig 3.

If you use mod_security on your server you might encounter that a website script is not compatible with mod_security. To disable mod_security (v2) for a website, add the following code into the apache directives field: <IfModule mod_security2.c&gt SecRuleEngine Off </IfModule&gt For the older mod_security 1 version, use these configuration directives: <IfModule mod_security.c> SecFilterEngine Off </IfModule> ... Read more

Where is the ISPConfig 3 configuration file?

ISPConfig 3 has two different configuration files, one for the server part and one for the interface. ISPConfig 3 Interface The config file location is: /usr/local/ispconfig/interface/lib/config.inc.php ISPConfig 3 Server The config file location is: /usr/local/ispconfig/server/lib/config.inc.php The MySQL root password that is used to create new MySQL databases only is stored in the file: /usr/local/ispconfig/server/lib/mysql_clientdb.conf

Enable image caching in apache for better Google Page Speed results

High page speed and short page load times of your website are essential for good search engine rankings today. In this FAQ, I will show you how to enable caching of graphic and CSS files in apache on Ubuntu and Debian. The first step is to enable the expires module in apache: a2enmod headers expires ... Read more

Fix “HTTP request length 134926 (so far) exceeds MaxRequestLen” error on Debian Linux

When you get a 500 error in a webpage hosted on Debian Linux (6.0) with apache webserver and fastcgi, take a look into the apache error.log file. This can either be the global error.log or the error.log of the website where you got the error. If you find a error similar to this one: [Fri Apr ... Read more