From the years, MS Exchange went through several updates and a new version with unbeatable features and Advantages. Even though the latest version of MS Exchange Mailbox is not only stable but also mature, it is still vulnerable when it comes to corruption. One can never guarantee the security of this platform. Corrupt data can ... Read more
More and more internet access providers are closing port 25 to reduce spam except for connections to their own mailservers. If you run your own mailserver and have problems to connect to it on port 25, you can enable port 465 (smtps) in postfix as a workaround. Edit the /etc/postfix/master.cf file: vi /etc/postfix/master.cf and remove ... Read more
This articles describes the renewal of SSL certificates for courier pop3 and imap server. This is nescessary e.g. when the certificates are expired or contain the wrong hostname. First delete the exsiting certificates: rm -f /etc/courier/imapd.pem rm -f /etc/courier/pop3d.pem Then edit the template that contains the details for the ecrtificates so that the hostname in ... Read more
Please check if the domain of the users that receives all emails is the same as the domain $mydomain in /etc/postfix/main.cf. If this is the case, change $mydomain and run: postfix reload on the shell. You should never enter a domain that is used for a virtual site on the server as $mydomain in /etc/postfix/main.cf!
ISPConfig 3 uses ClamAV (http://www.clamav.net) as virus scanner and spamassassin as spam scanner. Amavisd-new is used as content filter.
ISPConfig 2 uses ClamAV (http://www.clamav.net) as virus scanner and the E-mail Sanitizer (http://www.impsec.org/email-tools/procmail-security.html) as content filter.