| === HasMailAttributeWithValueRegex | |
| This Matcher determines if the mail contains the attribute specified in the | |
| condition and that attribute matches the supplied regular expression, | |
| it returns all recipients if that is the case. | |
| Sample configuration: | |
| .... | |
| <mailet match="HasMailAttributeWithValueRegex=whatever,<regex>" class="<any-class>"> | |
| .... | |
| Note: as it is not possible to put arbitrary objects in the configuration, | |
| toString() is called on the attribute value, and that is the value matched against. |