Sending an email doesn't work overnight (only a Debian 11 security update since). The error message is as follows: terminated with exit code 36, output: mail: cannot send message: Process exited with a non-zero status
If I try to send an email with the mail command itself, the same error occurs. I realized something important thing:
Bad: echo "Teszt" | mail -aFrom:nagios@icinga2.domain.cc -s "subject" nio@telemedia.hu
Good: echo "Teszt" | mail -aFrom:nagios@domain.cc -s "subject" nio@telemedia.hu
So if I use a full hostname, it doesn't work, if it's just the domain, it's good. I don't understand what has changed since Friday last week besides the Debian security updates.
Sending an email doesn't work overnight (only a Debian 11 security update since). The error message is as follows: terminated with exit code 36, output: mail: cannot send message: Process exited with a non-zero status
If I try to send an email with the mail command itself, the same error occurs. I realized something important thing:
Bad: echo "Teszt" | mail -aFrom:nagios@icinga2.domain.cc -s "subject" nio@telemedia.hu
Good: echo "Teszt" | mail -aFrom:nagios@domain.cc -s "subject" nio@telemedia.hu
So if I use a full hostname, it doesn't work, if it's just the domain, it's good. I don't understand what has changed since Friday last week besides the Debian security updates.