I get regularily such a mail

<mail> Anacron job 'cron.daily' on ....

/etc/cron.daily/logrotate:

error: error running non-shared postrotate script for /var/log/clamd.clamsmtp/clamsmtpd.log of '/var/log/clamd.clamsmtp/clamsmtpd.log ' </mail>

content of /etc/logrotate.d/clamsmtp

/var/log/clamd.clamsmtp/clamsmtpd.log { monthly notifempty missingok

postrotate pkill -SIGHUP -f clamd.clamsmtp >/dev/null 2>&1 || : endscript }

when looking at ls:

<ls -al /var/log/clamd.clamsmtp/> total 572 drwxr-xr-x. 2 clamsmtp mail 4096 May 1 03:15 . drwxr-xr-x. 6 root root 4096 May 1 03:15 .. -rw-r-----. 1 clamsmtp mail 953 May 1 08:43 clamsmtpd.log -rw-r-----. 1 clamsmtp mail 109806 Jan 1 10:28 clamsmtpd.log-20170101 -rw-r-----. 1 clamsmtp mail 114825 Feb 1 03:42 clamsmtpd.log-20170201 -rw-r-----. 1 clamsmtp mail 101356 Mar 1 03:50 clamsmtpd.log-20170301 -rw-r-----. 1 clamsmtp mail 112365 Apr 1 19:51 clamsmtpd.log-20170401 -rw-r-----. 1 clamsmtp mail 104204 May 1 03:15 clamsmtpd.log-20170501 </ls>

this shows normal

where does this error mail come from?

Thanks Walter