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If you are using CodeTwo Exchange Rules 2007 version 2.x or older, please consult this User's Manual.

Using Wildcards (*) for Specifying Ranges of SMTP Addresses
The senders and recipients can be defined by providing parts of their SMTP addresses. To specify a part of the address, use a wildcard or asterisk (*), which substitutes any string of characters. The asterisk can be used more than once in a single address.

The use of the asterisk is exemplified in Fig.1..

Specified senders in the scope of senders of a rule.
Fig.1. Specified senders in the scope of senders of a rule.


The example above includes an asterisk (*) sign, which substitutes any sequence of characters, standing in front of @company.com domain. This means the rule will apply to all senders belonging to this domain. Since there is an exception, the rule will not apply to those users of @company.com whose addresses include the word support. The asterisk (*) sign has been used in front of the word support and after it, so the condition is met by addresses such as: john_support@company.com, support_john@company.com, john.support.outlook@company.com.

The asterisk (*) sign has also been used in front of co.uk, which means that the rule will apply to all senders whose domain ends in co.uk, e.g. support@firm.co.uk, john@yahoo.co.uk.

For the rule to apply to all senders and recipients, the upper fields in the scope of senders and the scope of recipients form must include the asterisk (*) sign only or should be left empty. If you leave this field empty and hit Next, a dialog box will appear informing that this field cannot be left empty asking you, if you want to extend the scope of recipients/senders to all users (Fig.2.).

Dialog box asking whether to extend the scope of senders to all users.
Fig.2. Dialog box asking whether to extend the scope of senders to all users.