When upgrading my MiaB installation to 0.50 I encountered a strange error message that persists, even though the upgrade seems to have been (mostly) successful.
I ran the upgrade as usual via
curl -s https://mailinabox.email/setup.sh | sudo bash and got the message “from: can’t read /var/mail/::” as the output.
When I try to use the “mailinabox” command in a shell i get the same output.
So far I have not found any useful messages in any of the logs, the system seems to be working fine.
The other issue I encountered during the upgrade was a missing mta_sts_resolver (maybe the error broke something before it got installed?). The missing mta-sts-resolver broke the TLS(SSL) certificate page in the web interface (and the associated script), but this was all automagically fixed when I manually installed the resolver.
So, any ideas where this error message is coming from? The only thing in /var/mail is a hidden directory .spamassassin, which is empty.