==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 0.9.8
- Deployed with iRedMail Easy or the downloadable installer? Download
- Linux/BSD distribution name and version: CentOS 7.6.1810
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): PGSQL
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro? NO
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====
Hello,

Is there a default setting in iRedMail, or in postfix itself, that restricts the number of connections from a specific client within a set time period? This would be external email servers sending email to my server.

If so, can that be changed?

Thanks much!