Validation rules for approved and blocked senders lists
The following validation rules apply to all approved senders and blocked senders list entries.
Table: Validation rules for list entries
Full email addresses with valid domain names, such as email@example.com are valid
Partial email addresses, such as broberts@symantec are not valid
The * wildcard is not valid within an email address
Full domain names, such as example.com are valid
Top-level domains, such as com or uk are valid
Subdomains, such as name.domain.com are valid
Partial domains without the top-level domain, for example symantec or contoso are not valid
The * wildcard is not valid within a domain name
A series of basic IP address validation rules prevent any invalid IP addresses being entered into the spam lists
The * wildcard is valid to match the number in the last part of a dotted-quad IP address. For example 192.168.0.* can be used to represent all the host IP addresses on the 192.168.0.0/24 network. Two wildcards cannot be used in an IP address
IPv6 IP addresses are not valid
Imported Document ID: HOWTO101646
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