Sieve-Example:Notify
Send a notification email to another mailbox when the mailbox gets an email:
# rule:[notify]
if header :matches "subject" "*"
{
set "subject" "${1}";
notify :importance "2" :message "[Notification] ${subject}" "mailto:someone@example.com";
}
This sets a variable of the subject, and then sends an email to another mailbox using the subject line.