I just finished my first integration with MailGun (moving over from PostMark because MailGun has a better feature set imo) ... could not have been easier.
They have webhooks built in that can call your application when mail is delivered, bounced, opened, clicked, etc. That's huge for me. I allow my clients to send out emails to their users — now I can use that information to show my clients who has opened which emails ... I can also alert users if their email has become blocked or had a bounced email.
They give you a ton of functionality out of the box that would take a lot of time and effort to recreate on your own.
They have webhooks built in that can call your application when mail is delivered, bounced, opened, clicked, etc. That's huge for me. I allow my clients to send out emails to their users — now I can use that information to show my clients who has opened which emails ... I can also alert users if their email has become blocked or had a bounced email.
They give you a ton of functionality out of the box that would take a lot of time and effort to recreate on your own.