different wrote:
1 *Warning: Pre-queue content-filter connection overload
Not sure why it happened. Amavisd is configured as after-queue content-filter by default, not pre-queue. Did you modify it to act as pre-queue filter?
different wrote:
28 SASL authentication failed
It's normal. failed login will cause this error message. e.g. incorrect username or password.
Again, SMTP AUTH is enabled by default in iRedMail.