Configuring antispam settings : Configuring the block lists and safe lists : About block list and safe list address formats
About block list and safe list address formats
Acceptable input for block and safe list entries may vary by the type of the block or safe list, but may be:
all or part of an IP address
all or part of a domain name
all or part of an email address
Domain name portions (for example, example.com) and user name portions (for example, user1) may use wild cards (? and *).
 
Table 49: Examples of valid block/safe list entries
Example
Description of match
172.168.1
Email from the IP addresses 172.168.1.0/24
example.com
Email from any sender at example.com, such as user1@example.com.
spammer@example.com
Email from the sender spammer@example.com
?ser1@example.com
Email from any sender name ending in “ser1” at example.com
*@example.com
Email from any sender at example.com
user1@ex?mple.com
Email from the sender user1 in domains such as example.com, exemple.com, or exumple.com
user1@*.com
Email from the sender user1 at any .com domain
The following formats are not valid:
172.16.1.0
172.16.1.0/24
@spam. example.com