Hi, please Icinga does not send anymore notification mail when i type
sudo tail -f /var/log/mail.log here is the error that i get:
"Sep 4 10:54:11 icinga2server postfix/error[3342044]: A618DCF10BC: to=<webmaster@xxxx.org>, relay=none, delay=170709, delays=170688/21/0/0.1, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=smtp.office365.com
type=AAAA: Host not found, try again)"
Please i need your help, thank you.