postfix/anvil[pid]: statistics: max connection rate 1/60s for (smtp:xxx.xxx.xxx.xxx)

Project:Linux server
Component:Documentation
Category:support request
Priority:normal
Assigned:Unassigned
Status:active
Project wiki:server
Description

I get many errors like this one in my logs:

postfix/anvil[pid]: statistics: max connection rate 1/60s for (smtp:xxx.xxx.xxx.xxx)

What is it about? How to fix it?