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- The only accepted calls are those coming from IP addresses manually added in your MailUp admin console under Manage > Web Services > FrontEnd.
- Although the system allows you to disable this restriction, we strongly recommend that you do not do so.
- You can add an IP address to the list through the API itself: the function to be called is "WSActivation.aspx" (see WebService MailUpImport for details), and "ws_name=FrontEnd" is the parameter to be passed.
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