Accept emails from mailbots mailer-daemon and postmaster
This setting is found in the section Account management / Email / Incoming mail settings:
It controls how Planfix processes emails sent by mailbots. By default, this setting is not activated, meaning Planfix will not process emails sent by mailbots, and tasks and comments will not created using these emails. This lets you avoid having to deal with messages from bots, which are considered "trash" in the typical context of Planfix and don't usually need to be processed by a human.
If you need to keep these messages and process them in Planfix for some reason, enable this setting.