Digital Ocean & Mailgun Setup Issue

Developer help
3

Using following worked for me (port: 587, requireTLS: true and secure: false).

{
  "mail": {
    "from": "John Doe <john@example.net>",
    "transport": "SMTP",
    "options": {
      "service": "Mailgun",
      "host": "smtp.eu.mailgun.org",
      "port": 587,
      "requireTLS": true,
      "secure": false,
      "auth": {
        "user": "postmaster@example.net",
        "pass": "…"
      }
    }
  }
}