> On Jan 19, 2018, at 8:52 AM, Zach Sheppard <zshepp...@g.oconee.k12.sc.us>
> wrote:
>
> Jan 15 00:42:42 mailrelay postfix/qmgr[5601]: 8EF0980973:
> from=<aaaaaaaa...@oconee.k12.sc.us>, size=2408, nrcpt=1 (queue
> active)^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@
> Jan 15 09:31:40 mailrelay opendkim[668]: OpenDKIM Filter v2.11.0 starting
> (args: -x /etc/opendkim.conf)
What you see as "^@" is how ASCII NUL (the zero byte) is displayed
by "more", "less", "vi", ... It appears that the log file has either
lots of NULs written to it, or perhaps has a "hole" as a result of
truncation of the log file while it was still being written by the
syslog daemon. Perhaps incorrect log rotation...
As for high CPU, that's a bit hard to explain without further
information, which is difficult to obtain with a truncated log.
Postfix does not normally bring systems to their knees, its
resource limits are specifically designed to avoid that.
--
Viktor.
