Having only Mailgun integration for newsletter is a major hurdle for self-hosting

[muratcorlu]

Using SMTP for bulk emai is discussed as well.

Finally a clone of Mailgun API! (aka you can send newsletters with your SMTP)

I checked the code quickly. I tries to send mails to every recipient one-by-one, with the request comes from Ghost. But sending mail with SMTP takes so much time. With a large recipient list, it can’t fit the timeout limit of Ghost (60 seconds, normally Mailgun responds under 1 second). This is a confirmation of why sending bulk mail with SMTP is a bad idea. To achieve this, you need to have a distributed SMTP server, which can send mails concurrently from multiple servers at the same time. And…