What are wildcards and why are they useful?
Wildcards are a way to match any combination of words or symbols. The best way to explain wildcards is to show a few examples. Consider the following:| joe@somewhere.com | Block mail from joe at somewhere.com |
| j*@somewhere.com | Block mail from anyone who's username starts with a J at somewhere.com |
| *@somewhere.com | Block mail from anyone at somewhere.com |
| *savetrees* | Block mail from anyone at a domain name that has the word savetrees in it. |
| *.gov | Block mail from anyone at a government address |
| 205.199.212.* | Block mail from anyone at the network of 205.199.212.x |
| * | VERY DANGEROUS. This would block all electronic mail from everyone. |
Wildcards can be used anywhere inside email addresses, domain names or IP addresses. Wildcards can only be used at the beginning or end of subject, message content or header matches.
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Last Updated
7th o May, 2006
