Hi there, I trust you are well. I am experiencing some issues with local email delivery. I have a domain on an ISPConfig 3 server, which only uses the web service. DNS and Mail are handled externally. However, when sending mail to the domain from a mailbox hosted on the ISPConfig 3 server, the mail rejects immediately with: Sending of the message failed. An error occurred while sending mail. The mail server responded: <info@[domain]>: Recipient address rejected: Domain not found. Please check the message recipient "info@[domain]" and try again. I believe this is because the ISpconfig 3 server is attempting to deliver locally, and is not finding a mailbox for the domain, rather than delivering to the server as per the external DNS server. How does one resolve this issue.
Take care that you have not added this domain as email domain in ISPConfig and that the system hostname is not that exact domain (means not example.com, using e.g. server1.example.com is fine though).
Hi Till, I trust you are well. The recipient domain is not added to ISPConfig as an email domain at all. Only as a web domain. The sender is however added as an email domain, as I use the ISPConfig server for the sender domain. I seem to have fixed it however by creating a DNS zone within ISPConfig and adding a record pointing to the external mail server.
Do not add DNS zones in ISPConfig for domains that are managed outside. If the domain can not be resolved, then this is not related to ISPconfig but to DNS resolving of the OS, which fails. Maybe you have the wrong external DNS servers in /etc/resolv.conf file.
I see. Okay I'll remove the zone as DNS is handled externally. The /etc/resolv.conf file contains only: # cat /etc/resolv.conf # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN # 127.0.0.53 is the systemd-resolved stub resolver. # run "resolvectl status" to see details about the actual nameservers. nameserver 127.0.0.1 Should I add our nameservers here?
That worked. For anyone wanting to know how to add nameservers to Debian 12 using resolvconf; Edit the /etc/network/interfaces file: Code: # vim /etc/network/interfaces Add your nameservers under the gateway line. Be sure to match the indent syntax (iface stanza): Code: ... gateway 162.xx.xx.xxx dns-nameservers 129.xxx.xxx.xx xxx.xxx.xx.x # route xxx.xx.xxx.xxx/xx via xxx.xx.xxx.xxx ... Note: nameserver ip addresses are separated by a single space. Restart the Network deamon with: Code: # systemctl restart networking.service Test your changes: Code: # cat /etc/resolv.conf # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN # 127.0.0.53 is the systemd-resolved stub resolver. # run "resolvectl status" to see details about the actual nameservers. nameserver 129.xxx.xxx.xx nameserver 68.xxx.xx.x
