Question about Block list and safe list formats

[Bravnik]

Good day colleagues. 

Block list and safe list formats.

We can only add ip adresses range with prefix /24?

If im try add i am getting an error (The address is invalid.) 172.168.1.1/24 or need simply add 172.168.1 its same as 172.168.1.1/24?

sorry for the stupid question

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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 54:Examples of valid block/safe list entriesExample 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