502 bad gateway after reboot the server? any hep

[Jasosn88]

@mjw

  "mail": {
    "from": "noreply@guru61.com",
    "transport": "SMTP",
    "options": {
      "host": "smtp.eu.mailgun.org",
      "port": 587,
      "service": "Mailgun",
      "secure": false,
      "requireTLS": true,
      "auth": {
        "user": "postmaster@mg.guru66.com",
        "pass": "pass-wo-rd"
      }
    }
  },

Not working

SMTP settings

smtp.eu.mailgun.org

Our servers listen on ports 25, 587, and465(SSL/TLS)

Use full email address like

 brad@guru61.com 

as the username.

“mail”: {
“from”: “noreply@guru61.com”,
“transport”: “SMTP”,
“options”: {
“host”: “smtp.eu.mailgun.org”,
“port”: 587,
“service”: “Mailgun”,
“secure”: false,
“requireTLS”: true,
“auth”: {
“user”: “postmaster@guru66.com”,
“pass”: “b20465dda274a205ea2be3a6ec83fb75-d1a07e51-b5d918a5”
}
}
},