I have configured the DKIM on my domain correctly, the domain is managed via an external DNS server and the DKIM has been added to the domain. When I send emails to Google and Hotmail, it tells me DKIM = Failed in the email headers: dkim=temperror (no key for signature) header.i=@ Do you have any ideas, I have the impression that if the DNS zone is not managed by IspConfig the dkim is not supported. ISPConfig Version: 3.2 Debian 12 Do you have any ideas ? Thanks in advance
Your impression is completely wrong; of course, you can easily use an external DNS system for this. The only difference to ISPConfig's internal system is that you must add the DKIM TXT record yourself after creating the DKIM key in ISPConfig, as ISPConfig is not connected to that external DNS system to do it automatically. See this tutorial on how to enable DKIM for a email domain. The guide explains this for systems with external DNS servers: https://www.howtoforge.com/ispconfig-email-account/
