Requirements: ISPConfig >= 3.1 and Bind DNS-Server Installation: cd /tmp wget https://www.schaal-it.com/downloads/caa-patch.tgz tar xfz caa-patch.tgz cd caa-patch php -q install.php Install this patch on all servers in a multiserver-setup. What is a CAA-Record? CAA can be used to determine which certification authority is allowed to issue certificates for the domain. […]
To send emails with Postfix, a few things have to be considered. These are either defined in RFCs or generally useful. 1. matching reverse DNS RFC1912 requires that the PTR record and the A record in DNS match. On the one hand it shows that the administrator understands the RFCs, […]
I use SPF records for many years. My implementation of SPF records in ISPConfig occurred to me to point out the advantages again. SPF is an authentication method that is stored in the DNS. This entry specifies which server can send mail for a particular domain. And why do I […]