georgemandis
commented
6 years ago I know I’ve lurked and not been active on here in a long time, but I’d second the exploration. If the goal is something more dependable and debuggable, I’d also suggest exploring Amazon Simple Email Service under the AWS family of products: https://aws.amazon.com/ses/pricing
I’m not sure exactly how many emails you’r talking about sending but at $0.10 per 1,000 emails it might be comparable or better to Mailgun.
I know I pooh-poohed this when Vincent suggested it over a year ago since canvasdreams had been so reliable and was free. I've had a change of heart. I do like doing the verification ourselves the way we do now instead of using their verification since that is what is expensive (vs just sending mail): https://www.mailgun.com/pricing
Unfortunately, they haven't been reliable lately - we have had multiple reports of mails not going through. While I think this is probably something wrong with the way the site is running (not a problem with the way it is coded, but something wrong with their hosting environment/server setup), I don't have ability to debug and canvasdreams' tech support is NOT willing to help - when I asked, they can't even tell us if a mail was sent to whom - and they only store logs for 3 days (and took a week to tell me that, so all chance to debug was gone).
I've signed up for a mailgun account if anyone wants to try this, and sent @sdobz the login/password. At our usage levels it will be cheap enough and more debuggable.
This is not a strong ask, just a possibility to explore.