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Re: mail_queue_enter: create file maildrop/870989.992: Read-only file system

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On Mon, May 04, 2026 at 05:02:05PM +0200, Jan Claeys wrote:
> On Sun, 2026-05-03 at 20:20 +0000, Andy Smith wrote:
> > Although I confess I don't really understand why a
> > process launched by monit would be directly trying to write to the
> > postfix directory as I would have thought it talks to postfix and
> > then something from postfix delivers the mail. But since the same
> > thing appears to have happened with netdata and other software then I
> > think it's got a good chance.
> 
> Typically such applications use /usr/sbin/sendmail to send mail, which
> is usually a binary supplied by the MTA you use (Postfix in this case).
> 
> Depending on the implementation & configuration of /usr/sbin/sendmail
> it might try to do anything from dropping a file in a specific location
> to connecting to an external mail server.
> 
> 
> The problem might indeed be systemd or AppArmor or similar blocking
> sendmail from doing its thing (possibly also because it’s being run
> with restrictions set for Monit, which don’t take into account the
> specifics of the /usr/sbin/sendmail you are using).

This all doesn't rhyme with the error message given ("read-only file
system"), unless the error message is lying, that is.

Cheers
-- 
t

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mail_queue_enter: create file maildrop/870989.992: Read-only file  system Luc Saffre <luc@saffre-rumma.net> - 2026-05-03 02:00 +0200
  Re: mail_queue_enter: create file maildrop/870989.992: Read-only  file system Andy Smith <andy@strugglers.net> - 2026-05-03 03:00 +0200
    Re: mail_queue_enter: create file maildrop/870989.992: Read-only  file system Greg Wooledge <greg@wooledge.org> - 2026-05-03 04:20 +0200
      Re: mail_queue_enter: create file maildrop/870989.992: Read-only  file system David Wright <deblis@lionunicorn.co.uk> - 2026-05-03 06:30 +0200
        Re: mail_queue_enter: create file maildrop/870989.992: Read-only  file system Greg Wooledge <greg@wooledge.org> - 2026-05-03 14:30 +0200
      Re: mail_queue_enter: create file maildrop/870989.992: Read-only  file system Andy Smith <andy@strugglers.net> - 2026-05-03 22:30 +0200
        Re: mail_queue_enter: create file maildrop/870989.992: Read-only  file system Jan Claeys <lists@janc.be> - 2026-05-04 17:10 +0200
          Re: mail_queue_enter: create file maildrop/870989.992: Read-only  file system <tomas@tuxteam.de> - 2026-05-04 17:50 +0200
            Re: mail_queue_enter: create file maildrop/870989.992: Read-only  file system Michael Greenberg <michael@greenberg.science> - 2026-05-04 18:40 +0200
              Re: mail_queue_enter: create file maildrop/870989.992: Read-only  file system tomas@tuxteam.de - 2026-05-04 19:30 +0200
    Re: mail_queue_enter: create file maildrop/870989.992: Read-only file  system Luc Saffre <luc@saffre-rumma.net> - 2026-05-10 16:00 +0200
      Re: mail_queue_enter: create file maildrop/870989.992: Read-only file  system Luc Saffre <luc@saffre-rumma.net> - 2026-05-10 16:30 +0200
      Re: mail_queue_enter: create file maildrop/870989.992: Read-only  file system Andy Smith <andy@strugglers.net> - 2026-05-11 02:50 +0200
        Re: mail_queue_enter: create file maildrop/870989.992: Read-only  file system Greg Wooledge <greg@wooledge.org> - 2026-05-11 03:30 +0200
          Re: mail_queue_enter: create file maildrop/870989.992: Read-only file  system Luc Saffre <luc@saffre-rumma.net> - 2026-05-14 09:30 +0200
            Re: mail_queue_enter: create file maildrop/870989.992: Read-only  file system Greg Wooledge <greg@wooledge.org> - 2026-05-14 13:40 +0200

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