> On Jun 8, 2018, at 6:47 AM, Daniel Armengod <dan...@pangea.org> wrote:
>
> TL;DR: `sendmail <address>` fails with `sendmail: fatal: could not find
> any active network interfaces` if loopback interface is not up. Is this
> expected behaviour?
Yes, expected. The failure is in common initialization code that is
not sendmail command specific. The "mynetworks", "myhostname",
"mydomain" and "myorigin" parameters are initialized in the same way
across all of Postfix, and internally a list of "own" network
addresses is also computed. This code expects to find at least one
interface even on systems not connected to a network.
--
Viktor.
