first : check that postfix is running well : sudo systemctl status postfix.service.
Maybe you could post the log content in /var/log/mail.log and /var/log/mail.err when the error occured. Please also provide full message headers.
mail.err and mail.warn are empty mail.info contains:
Jan 3 10:18:34 raspberrypi postfix/qmgr[3276]: 1A10943B1D: from=jean@domaine.tld, size=980, nrcpt=1 (queue active)
Jan 3 10:18:34 raspberrypi postfix/smtp[20231]: connect to 127.0.0.1[127.0.0.1]:10024: Connection refused
Jan 3 10:18:34 raspberrypi postfix/smtp[20231]: 1A10943B1D: to=contact@adomain.com, relay=none, delay=139037, delays=139037/0.12/0/0, dsn=4.4.1,
status=deferred (connect to 127.0.0.1[127.0.0.1]:10024: Connection refused)
Is that the good command line? because systemctl does not exist on my system (raspbian wheezy)
$ sudo sysctl status postfix.service
sysctl: cannot stat /proc/sys/status: Aucun fichier ou dossier de ce type
sysctl: cannot stat /proc/sys/postfix/service: Aucun fichier ou dossier de ce type
I have seen that amavis was not started I restart it
It’s look like sending mail is possible again YAEH!!!
but a lot of mail are tagged as spam ???
so may be I have this issue https://dev.yunohost.org/issues/131 …