title: messages lost due to rate-limiting
body: <p>We are testing the capacity of a Mail relay based on RHEL 7.6.
  We are observing issues when sending an important number of msgs (e.g.: ~1000 msgs in 60 seconds).
  While we have sent all the msgs and the recipient has received all the msgs, logs are missing in the /var/log/maillog_rfc5424.</p>
  
  <p>We have the following message in the /var/log/messages: </p>
  
  <pre><code>rsyslogd: imjournal: XYZ messages lost due to rate-limiting
  </code></pre>
  
  <p>We adapted the /etc/rsyslog.conf with the following settings but without effect:</p>
  
  <pre><code>$SystemLogRateLimitInterval 0  # turn off rate limit
  $SystemLogRateLimitBurst 0     # turn rate limit off
  </code></pre>
  
  <p>Any ideas ?</p>