ALLOWNEWSOURCES
ALLOWNEWSOURCES is a configuration directive found in certain software, most notably in some email client or server software, that controls whether new or unknown sender email addresses are permitted to send messages to a particular recipient or system. When ALLOWNEWSOURCES is enabled, the system will accept emails from addresses it has not previously interacted with. Conversely, if it is disabled, the system may reject or flag emails from new senders, potentially as a security measure to combat spam or phishing attempts.
The primary purpose of this setting is often related to security and spam filtering. By default, many
The implementation and effect of ALLOWNEWSOURCES can vary depending on the specific software. Some systems might