> > Maybe I was a bit unclear: I have about 1000 error messages per day from > random accounts (about 500 in total so far) on all clusters. These are > transparent to the user, so it's more like background noise at the > moment.
Do you have ecc memory? > No VM involved. All machines are baremetal DRBD two-node clusters. How old are your drives? Do you scrub the raids? How reliable is your drbd setup? Does drbd even sync raid fixes? Do you have networking issues? Connect a hdd directly and use that for a few accounts, do you still have the problem? I will bet not. Why do you have this bare metal? Do you need performance? Otherwise switch to reliable storage that is a bit less performing. You will get headaches from these multiple drbd setups. > As far as I see it I can not nail it down to specific accounts, POP3 vs. > IMAP, LMTP delivery vs. IMAP store or Sieve vs. non-Sieve etc. > It is not dovecot, otherwise it would be here more often listed.
