Adding and Removing Subscribers and Unknown Users

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Using IMail Administrator (not Web Messaging or the Web Remote Administration Utility), a list administrator can create special aliases that:

• Subscribe the sender of a mail message to a list
• Remove the sender of a mail message from a list
• Remove unknown users from a list

Once these aliases are created, mail can be forwarded to one of these aliases to accomplish the desired task.

Setting Up an Alias to Remove an Unknown User

If you get "unknown user" or "unknown host" messages about supposed subscribers to a list, you can create an alias to remove such users from a list.

To set up a special alias for removing unknown users or hosts:

1. In IMail Administrator, expand a mail host folder and select the "Aliases" folder.
2. Click the Add Alias button. In the "New Alias" dialog box:
   • Enter an alias name, for example: Parrots_del
   • Select the Program alias type.
   • Click OK.
3. On the General tab, in the Resolves To box, enter the alias properties using the following format:

   imailsrv -ruhost domain listname 
   

For example, suppose you create a program alias Unknown_del that resolves to:

imailsrv -ruhost exoticbirds.com Parrotlist 

You can then forward a message about an unknown user or unknown host to Parrots_del@exoticbirds.com; the user specified in the Reply-To header (or the From header if Reply-To is not found) of the forwarded message is removed from Parrotlist. (The body of the message is ignored.)

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