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Enabled by default and allows anonymous (not logged in) users to send packages to registered application users or domains.
If enabled, it is possible since version 2.3.10 to use a special URL with built in parameters, that modifies the anonymous sending form, like setting a fixed recipient. Such a link can be than used to direct anonymous users to send a package to a specific recipient. For example in this way: https://sofie.sonpo.cz/#/?template&recipient=sofie@sonpo.cz&password=false&expiration=false .
If disabled, it is so called “request only” mode, which means anonymous users cannot send packages by themselves and can only react to a request sent by a registered user. Also sets and fixes the welcome page content to the Login state (ignoring settings in Settings - Configuration - Appearance).
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