I am suffering from slow e-mail delivery on my discourse website. For example, the first e-mail after signing up delays more than 7 minutes to arrive and also the one to recover passwords.
How can I improve the speed and priority of these e-mails delivery? It is a real pain in the ass creating a new account and not receive any verification e-mail within minutes.
I am using mailgun as the provider, CloudFlare and Digital Ocean.
Please, follow the attached picture of my DNS settings at CloudFlare.