Hi, On Sun, May 03, 2026 at 02:50:47AM +0300, Luc Saffre wrote: > Soon after rebooting, I have the following message in my journal: > > apr 28 08:07:30 lumi postfix/postdrop[992]: warning: mail_queue_enter: > create file maildrop/870989.992: Read-only file system
For some reason your filesystem has gone read-only. If I were you I'd be looking further back in the logs to see if there is anything about that, as I would expect there to be. The rest of your mail seems to describe the efforts of your system to deliver email to the root user, which can't happen because the filesystem is read-only. There's no indication that the reason for it going read-only is related to postfix or monit (but it could be). It's not surprising that it does eventually run out of memory if a frequently running cron job results in several processes that get stuck each time trying to deliver email. The root cause of the filesystem going read-only needs to be determined. Even if the server crashes, the logs from before that should be available. Thanks, Andy -- https://bitfolk.com/ -- No-nonsense VPS hosting
