I have a local machine that I use for backup. For the past week I haven’t been seeing status messages. Looking into my /var/log/syslog, I saw:
Jun 13 04:37:07 foureyes postfix/postdrop[138227]: warning: uid=0: File too large
Jun 13 04:37:08 foureyes postfix/sendmail[138226]: warning: mail_stream_cleanup: close error
Jun 13 04:37:08 foureyes postfix/sendmail[138226]: fatal: root(0): message file too big
Jun 13 04:37:08 foureyes CRON[138018]: (root) MAIL (mailed 12798406 bytes of output but got status 0x004b from MTA#012)
I guess that means what I’m printing out for the backup is bigger than the ~10M that the Postfix default allows. Time to do something about that:
$ postconf | grep message_size_limitmessage_size_limit = 10240000
$ sudo postconf message_size_limit=0
$ postconf | grep message_size_limitmessage_size_limit = 0
Hopefully that did it.