RE: Handle ticket based of email address.
Often when setting up email filters, I usually set them up like this:
from: .*email@address.com.*
or
from: .*@address.com.*
as emails often can contain display name and come in as "Email address" <email@address.com>
Hans' example would work as well, though would also trigger if email@address.com was in some other part of the header (e.g. cc)