Using Wildcards (*) For Specifying Ranges Of SMTP AddressesThe 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.
|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: email@example.com, firstname.lastname@example.org, email@example.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. firstname.lastname@example.org, email@example.com.
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 be left empty.