iRedAPD-3.0 (Postfix policy server) has been released, it fixes few issues, including one critical issue which causes throttling doesn't work. All users should upgrade as soon as possible.

• Fixed: '&' is not allowed in username part of email address.

• Fixed: Not include all possible sender addresses while applying greylisting setting.

• Fixed: Throttling doesn't work.

Upgrading is easy, just follow our short tutorial: https://docs.iredmail.org/upgrade.iredapd.html