I'm looking for an email auto responder that has this feature:
- When user sends first email, they get a response with email a.
- When user receives email a and sends second email, they get responded with email b - Only if they have received email a.
There are many products which can achieve the first stage, but is there a product, that can be linked with WordPress (maybe plugin form) which can achieve both stages?
If you have any suggestions please share (ideally free products but I would be prepared to buy if it's the best solution).