Is it possible to add Email Marketing Services to the module, integration with Amazon Simple Email Service.
This is probably the cheapest group email sending system at the moment. It is many times cheaper than Mailchimp, UniSender, SendPulse and every other one I have found. I was surprised when I saw the differences in prices, although I am not a fan of Amazon, the competition here is too far behind.
It is important that integration takes place via API. Because after the user, SMTP is, as I have read, less efficient and more problematic.
If possible, I would be happy to make a donation.