==== Required information ====
- iRedMail version (check /etc/iredmail-release):
- Linux/BSD distribution name and version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Web server (Apache or Nginx):
- Manage mail accounts with iRedAdmin-Pro?
- Related log if you're reporting an issue:
====

Centos 6.x mySQL Pro v2.3.1

Modifications to     /opt/iredapd/settings.py
# Enabled plugins.
#
# - Plugin name is file name which placed under 'plugins/' directory,
#   without file extension '.py'.
# - Plugins are applied in specified order. It's better to list plugins which
#   doesn't require SQL/LDAP query first (e.g. reject_null_sender), then
#   white/blacklist related plugins, e.g. amavisd_wblist.
# - Suggested order of plugins (if you enable them) for RCPT state:
#
#   1: reject_null_sender
#   2: amavisd_wblist
#   3: reject_sender_login_mismatch
#
#   LDAP backend:
#
#   4: ldap_force_change_password_in_days
#   5: ldap_maillist_access_policy
#
#   SQL backends:
#
#   4: sql_force_change_password_in_days
#   5: sql_alias_access_policy
#   6: sql_user_restrictions

The plugin reject_sender_login_mismatch is not referenced in new version release.  Is this being dropped and/or already gone?  What will take its place if anything?