=== SenderIsRegex

Matches mails that are sent by a sender whose address matches a regular expression.

Is equivalent to the RecipientIsRegex matcher but matching on the sender.

Configuration string: a regular expression.

....
<mailet match="SenderIsRegex=<regular-expression>" class="<any-class>">
....

The example below will match any sender in the format user@log.anything

....
<mailet match="SenderIsRegex=(.*)@log\.(.*)" class="<any-class>">
</mailet>
....

Another example below will match any sender having some variations of the string
*mp3* inside the username part.

....
<mailet match="SenderIsRegex=(.*)(mp3|emmepitre)(.*)@" class="<any-class>">
</mailet>
....