Yes, these are virtual machines. The OS is Red Hat Enterprise Linux 7.9.
------- Original Message ------- On Thursday, August 25th, 2022 at 2:52 AM, Wietse Venema <wie...@porcupine.org> wrote: > > > Brad Chandler: > > > Aug 15 18:51:24 mx03 postfix/smtpd[13552]: fatal: watchdog timeout > > Aug 15 18:51:25 mx03 postfix/master[1553]: warning: process > > /usr/libexec/postfix/smtpd pid 13552 exit status 1 > > > That is a Postfix safety mechanism for a rare infrastructure bugs > that mess up Postfix event handling (typically, whether or not a > file descriptor is readable). > > - What OS distribution is this? > > - Is the system running on virtual hardware? > > Wietse
