For one of our sites we now want to use a third party email service instead of sending emails out ourselves..
(We are trying to move it away from running our own mail server as we aren't happy with the email software we have been using.)
This list only has about 4,000 subscribers and they are all single opt in.
We don't really want to go down the road of trying to reconfirm all of these folks as one always loses a high percentage of them through lack of action etc.
Does anyone know of any single opt in email providers?