You could use uptimerobot[0] to monitor your server's SMTP port and alert you on telegram/sms/whatever. Sure that's not a guarantee that mail actually gets tro

You could use uptimerobot[0] to monitor your server's SMTP port and alert you on telegram/sms/whatever. Sure that's not a guarantee that mail actually gets trough, but I think there's no shortcut for that other than sending an actual mail from an external service and checking its delivery. [0]: http://uptimerobot.com http://uptimerobot.com