Requesting Help Troubleshooting Mailgun

Developer help Self-hosting
5

Yup, I saw that suggestion about adding “requireTLS” from your previous post (Unable to set up Mailgun).

I’ve run my config through the linter (https://jsonlint.com/) just in case I’ve overlooked some kind of formatting error.

I’ve tried different ports (25, 587, 465), quoted and unquoted.

	},
	"mail": {
		"from": "reTHINK HOA BLOG <noreply@rethinkhoa.com>",
		"transport": "SMTP",
		"options": {
			"service": "Mailgun",
			"host": "smtp.mailgun.org",
			"port": 587,
			"secure": false,
			"requireTLS": true,
			"auth": {
				"user": "postmaster@mg.mailgun.org",
				"pass": "<password>"
			}
		}
	},

I’m a little bit confused why outlook is mentioned in the error message. My account I’m using with mailgun is an outlook email. I’ve set up DNS entries in Amazon Route 53 and the Mailgun confirms the configuration with the green check. :woman_shrugging:t2:

Error sending email! Error sending email: Failed to send email. Reason: Invalid login: 535 5.7.139 Authentication unsuccessful, the user credentials were incorrect. [MW4PR02CA0023.namprd02.prod.outlook.com 2023-03-20T18:40:54.621Z 08DB27FEA98F708E]. Please check your email settings and resend the invitation.