I think it is a mistake to try and build your own email system. There is so much that goes into dealing with spam filters and maintaining good standing with spam blacklists. If you want tight integration you could build a UI for sending emails within WA that uses Mailchimp or ConstantContact on the back end.
With Mailchimp it is easy to use their API to add/remove/update list members, and update WA with data about delivery, clicks, etc. from MailChimp.
chrowe
I think it is a mistake to try and build your own email system. There is so much that goes into dealing with spam filters and maintaining good standing with spam blacklists. If you want tight integration you could build a UI for sending emails within WA that uses Mailchimp or ConstantContact on the back end.
With Mailchimp it is easy to use their API to add/remove/update list members, and update WA with data about delivery, clicks, etc. from MailChimp.