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https://edafe.de/2025/10/configure-nullmailer-with-a-relay-host/ · 14 Oct 2025
"If you want to receive status updates from your Debian or Ubuntu system, you need to employ the help of a mail tansfer agent (MTA). nullmailer is a relay-only forwarding MTA that can be used as an alternative to more complex MTAs such as Exim, Sendmail or...