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Global Sender Address Filters
With Incoming Mail Filters you can set-up global rules for filtering incoming emails. These rules are applied on every incoming mails on all mail accounts.
On the Sender email address filters page you can create a ruleset to accept or reject the emails based on the sender email address.
A rule consists of a regular expression and an action. When an email comes in, the engine checks the first rule if its regular expression matches the sender's email address. If it matches the expression, the selected action for the rule is applied. If it does not match, the next rule is checked. If there is no match, the default action is applied.
You can create any number of rules. The order of the rules can be changed by dragging and dropping the rules using the arrows icon in the first column.
Note: The default action cannot be deleted and cannot be moved.