Cannot get ghost to send mail from Google Cloud Platform

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Issue Summary

Tested sending email using SMTP from ssh and verified that I can relay to mailgun using postfix and got test email. Mailgun also shows the mail on the log.

However, when sending a test notification from the lab tab, sometimes the button spins and nothing happens or a toastr with [object object] shows up.

confirmed in mailgun logs that nothing was submitted.

Steps to Reproduce

1. Installed ghost from bitnami to google cloud platform.
2. signed up for mailgun and then followed google’s guide to setup postfix and was able to test send an email from ssh.
3. Modified the ghost config to send using localhost so postfix will relay to mailgun, restart ghost
4. Go to lab tab and send a test email

Any other info e.g. Why do you consider this to be a bug? What did you expect to happen instead?

Technical details:

• Ghost Version: 0.8.0
• Browser/OS: Google Compute Engine/Bitnami

    production: {
        url: 'http://104.197.36.249:80',
        mail: {
            transport: 'SMTP',
            options: {
                port: 2525,
                host: 'localhost',
            }
        },
        database: {
            client: 'sqlite3',
            connection: {
                filename: path.join(__dirname, '/content/data/ghost.db')
            },
            debug: false
        },
        server: {
            host: '127.0.0.1',
            port: '2368'
        }
    },

also tried

    production: {
        url: 'http://104.197.36.249:80',
        mail: {
            transport: 'SMTP',
            options: {
                service: 'Mailgun',
                port: 2525,
                auth: {
                    user: 'mailgunusername',
                    pass: 'guid',
                },
            }
        },
        database: {
            client: 'sqlite3',
            connection: {
                filename: path.join(__dirname, '/content/data/ghost.db')
            },
            debug: false
        },
        server: {
            host: '127.0.0.1',
            port: '2368'
        }
    },

[zhaoyibo]

As you may know, Google Cloud Platform doesn’t allow outbound connection to ports 25, 465 and 587

So you just change port of MailGun to 2525

  "mail": {
    "transport": "SMTP",
    "options": {
        "service": "Mailgun",
        "port": 2525,
        "auth": {
            "user": "yourname",
            "pass": "yourpasswd"
        }
    }
  },

It works for me.

[samsonlarsson]

Okay, so I was dealing with this today, and nothing would work till I added the host value, as below.

"mail": {
    "transport": "SMTP",
    "options": {
        "service": "Mailgun",
        "host": "smtp.mailgun.org",
        "port": 2525,
        "auth": {
            "user": "yourname",
            "pass": "passcode"
        }
    }
},

Just for anyone else who might be experiencing this.